EduSahara™ Assignment
Name : Proportion Concepts
Chapter : Ratio and Proportion
Grade : ICSE Grade VII
License : Non Commercial Use
Question
1
1.
Find the missing value in the equation
____
:
1
=
4
:
2
(i)
2
(ii)
3
(iii)
0
(iv)
4
(v)
1
Question
2
2.
Find the missing value in the equation
39
:
____
=
195
:
5
(i)
0
(ii)
2
(iii)
(-1)
(iv)
1
(v)
4
Question
3
3.
Find the missing value in the equation
20
:
5
=
____
:
4
(i)
16
(ii)
17
(iii)
13
(iv)
15
(v)
19
Question
4
4.
Find the missing value in the equation
36
:
9
=
12
:
____
(i)
5
(ii)
3
(iii)
4
(iv)
0
(v)
2
Question
5
5.
Find the product of extremes of
18
:
5
and
12
:
1
(i)
21
(ii)
60
(iii)
18
(iv)
17
(v)
16
Question
6
6.
Find the product of extremes of
9
4
:
13
17
and
1
14
:
11
15
(i)
11
6
(ii)
7
4
(iii)
31
20
(iv)
13
238
(v)
33
20
Question
7
7.
Find the product of means of
12
:
14
and
14
:
1
(i)
12
(ii)
193
(iii)
196
(iv)
198
(v)
195
Question
8
8.
Find the product of means of
13
3
:
13
8
and
11
9
:
3
10
(i)
145
72
(ii)
143
70
(iii)
47
24
(iv)
143
72
(v)
13
10
Question
9
9.
Find the mean proportional of
32
and
2
(i)
8
(ii)
32
(iii)
5
(iv)
64
(v)
2
Question
10
10.
Find the third proportional of
50
and
10
(i)
(-1)
(ii)
50
(iii)
10
(iv)
2
(v)
100
Question
11
11.
Find the fourth proportional of
24
,
6
and
36
(i)
11
(ii)
9
(iii)
36
(iv)
6
(v)
7
Question
12
12.
Which of the ratios is proportional to 36 : 9?
(i)
29
:
7
(ii)
28
:
7
(iii)
27
:
7
(iv)
28
:
5
(v)
28
:
9
Question
13
13.
Find the mean proportional of
128
and
2
(i)
128
(ii)
16
(iii)
13
(iv)
2
(v)
256
Question
14
14.
Find the third proportional of
72
and
12
(i)
(-1)
(ii)
12
(iii)
144
(iv)
72
(v)
2
Question
15
15.
Find the fourth proportional of
30
,
5
and
18
(i)
1
(ii)
6
(iii)
5
(iv)
18
(v)
3
Question
16
16.
Which of the ratios is proportional to 12 : 3?
(i)
16
:
4
(ii)
17
:
4
(iii)
15
:
4
(iv)
16
:
6
(v)
16
:
1
Question
17
17.
If
a
:
b
::
c
:
d
,
then
(i)
ad = bc
(ii)
ac = bd
(iii)
ab = cd
(iv)
abc = bcd
Question
18
18.
The ratio 3 : 5 is proportional to which of the following ratios?
(i)
18
:
10
(ii)
9
:
15
(iii)
15
:
20
(iv)
6
:
30
(v)
12
:
25
Question
19
19.
Which of the following represents a proportion ?
(i)
33
:
49
::
66
:
147
(ii)
31
:
47
::
93
:
188
(iii)
32
:
48
::
128
:
192
(iv)
34
:
50
::
102
:
100
(v)
30
:
46
::
120
:
138
Question
20
20.
Which of the following does not represent a proportion ?
(i)
12
:
8
::
60
:
40
(ii)
12
:
10
::
36
:
30
(iii)
21
:
18
::
42
:
36
(iv)
5
:
4
::
10
:
12
(v)
12
:
9
::
48
:
36
Question
21
21.
If
a
:
b
::
c
:
d
,
then '
d
' is called
(i)
extreme
(ii)
third proportional
(iii)
mean proportional
(iv)
second term
(v)
first term
Question
22
22.
If
a
:
b
::
b
:
c
,
then '
b
' is called
(i)
third proportional
(ii)
extreme
(iii)
mean proportional
(iv)
fourth proportional
(v)
first term
Question
23
23.
If
a
:
b
::
b
:
c
,
then '
c
' is called
(i)
second term
(ii)
first term
(iii)
third proportional
(iv)
mean proportional
Question
24
24.
If
a
:
b
::
b
:
c
,
then the mean proportional is
(i)
b
(ii)
ac
(iii)
a
(iv)
bc
(v)
c
Question
25
25.
If
a,b,c,d,e,f
are in continued proportion, then which of the following is true?
(i)
a
b
=
b
c
=
c
d
(ii)
a
b
=
c
d
=
e
f
(iii)
a
b
b
c
=
b
c
c
d
=
c
d
d
e
(iv)
ab
=
bc
=
cd
=
de
Question
26
26.
If
15
:
25
::
x
:
30
, find '
x
'
(i)
19
(ii)
20
(iii)
15
(iv)
17
(v)
18
Question
27
27.
Find the fourth proportional of 30, 36, 15
(i)
16
(ii)
18
(iii)
17
(iv)
21
(v)
19
Question
28
28.
Find the third proportional of 3 and 6
(i)
11
(ii)
10
(iii)
12
(iv)
13
(v)
15
Question
29
29.
Find the mean proportional of
1
and
9
(i)
3
(ii)
2
(iii)
0
(iv)
4
(v)
6
Question
30
30.
If
9
,
x
,
81
are in continued proportion, find
x
(i)
25
(ii)
28
(iii)
27
(iv)
30
(v)
26
Question
31
31.
Find the mean proportional between
5.7
and
51.3
(i)
18.1
(ii)
15.1
(iii)
16.1
(iv)
19.1
(v)
17.1
Question
32
32.
Find the mean proportional between
√
5
and
4
√
20
(i)
2
√
7
(ii)
2
√
10
(iii)
2
√
12
(iv)
2
4
√
10
(v)
20
Question
33
33.
Find two numbers whose mean proportional is
14
and third proportional is
112
(i)
9
and
28
(ii)
7
and
26
(iii)
8
and
28
(iv)
7
and
28
(v)
7
and
27
Assignment Key
1) (i)
2) (iv)
3) (i)
4) (ii)
5) (iii)
6) (v)
7) (iii)
8) (iv)
9) (i)
10) (iv)
11) (ii)
12) (ii)
13) (ii)
14) (v)
15) (v)
16) (i)
17) (i)
18) (ii)
19) (iii)
20) (iv)
21) (i)
22) (iii)
23) (iii)
24) (i)
25) (i)
26) (v)
27) (ii)
28) (iii)
29) (i)
30) (iii)
31) (v)
32) (ii)
33) (iv)
