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
____
:
7
=
28
:
7
(i)
30
(ii)
28
(iii)
29
(iv)
27
(v)
26
Question
2
2.
Find the missing value in the equation
10
:
____
=
50
:
5
(i)
0
(ii)
(-1)
(iii)
1
(iv)
2
(v)
3
Question
3
3.
Find the missing value in the equation
16
:
4
=
____
:
4
(i)
18
(ii)
14
(iii)
17
(iv)
15
(v)
16
Question
4
4.
Find the missing value in the equation
12
:
2
=
30
:
____
(i)
4
(ii)
2
(iii)
6
(iv)
5
(v)
7
Question
5
5.
Find the product of extremes of
16
:
17
and
4
:
17
(i)
271
(ii)
68
(iii)
270
(iv)
274
(v)
272
Question
6
6.
Find the product of extremes of
16
19
:
15
4
and
7
17
:
1
12
(i)
4
55
(ii)
2
57
(iii)
2
19
(iv)
4
57
(v)
105
68
Question
7
7.
Find the product of means of
12
:
18
and
8
:
4
(i)
143
(ii)
48
(iii)
146
(iv)
144
(v)
142
Question
8
8.
Find the product of means of
17
15
:
3
10
and
17
12
:
19
7
(i)
17
40
(ii)
19
40
(iii)
17
38
(iv)
3
8
(v)
323
105
Question
9
9.
Find the mean proportional of
18
and
2
(i)
6
(ii)
18
(iii)
3
(iv)
2
(v)
36
Question
10
10.
Find the third proportional of
50
and
10
(i)
2
(ii)
50
(iii)
100
(iv)
(-1)
(v)
10
Question
11
11.
Find the fourth proportional of
12
,
3
and
20
(i)
2
(ii)
8
(iii)
5
(iv)
3
(v)
20
Question
12
12.
Which of the ratios is proportional to 28 : 7?
(i)
9
:
2
(ii)
8
:
-1
(iii)
8
:
2
(iv)
7
:
2
(v)
8
:
5
Question
13
13.
Find the mean proportional of
98
and
2
(i)
12
(ii)
196
(iii)
2
(iv)
14
(v)
98
Question
14
14.
Find the third proportional of
32
and
8
(i)
8
(ii)
0
(iii)
32
(iv)
2
(v)
64
Question
15
15.
Find the fourth proportional of
12
,
3
and
24
(i)
4
(ii)
6
(iii)
9
(iv)
24
(v)
3
Question
16
16.
Which of the ratios is proportional to 24 : 6?
(i)
28
:
7
(ii)
28
:
5
(iii)
28
:
10
(iv)
29
:
7
(v)
27
:
7
Question
17
17.
If
a
:
b
::
c
:
d
,
then
(i)
abc = bcd
(ii)
ac = bd
(iii)
ad = bc
(iv)
ab = cd
Question
18
18.
The ratio 5 : 4 is proportional to which of the following ratios?
(i)
15
:
16
(ii)
10
:
8
(iii)
30
:
20
(iv)
20
:
12
(v)
25
:
24
Question
19
19.
Which of the following represents a proportion ?
(i)
34
:
41
::
102
:
164
(ii)
36
:
43
::
72
:
129
(iii)
35
:
42
::
105
:
126
(iv)
33
:
40
::
132
:
120
(v)
37
:
44
::
111
:
88
Question
20
20.
Which of the following does not represent a proportion ?
(i)
6
:
5
::
12
:
15
(ii)
14
:
12
::
42
:
36
(iii)
16
:
12
::
80
:
60
(iv)
15
:
12
::
60
:
48
(v)
24
:
21
::
48
:
42
Question
21
21.
If
a
:
b
::
c
:
d
,
then '
d
' is called
(i)
mean proportional
(ii)
second term
(iii)
first term
(iv)
extreme
(v)
third proportional
Question
22
22.
If
a
:
b
::
b
:
c
,
then '
b
' is called
(i)
third proportional
(ii)
mean proportional
(iii)
first term
(iv)
extreme
(v)
fourth proportional
Question
23
23.
If
a
:
b
::
b
:
c
,
then '
c
' is called
(i)
mean proportional
(ii)
first term
(iii)
second term
(iv)
third proportional
Question
24
24.
If
a
:
b
::
b
:
c
,
then the mean proportional is
(i)
c
(ii)
b
(iii)
bc
(iv)
ac
(v)
a
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
12
:
15
::
20
:
x
, find '
x
'
(i)
27
(ii)
25
(iii)
23
(iv)
26
(v)
24
Question
27
27.
Find the fourth proportional of 24, 36, 16
(i)
22
(ii)
24
(iii)
27
(iv)
23
(v)
25
Question
28
28.
Find the third proportional of 25 and 10
(i)
6
(ii)
5
(iii)
4
(iv)
3
(v)
1
Question
29
29.
Find the mean proportional of
7
and
112
(i)
28
(ii)
30
(iii)
27
(iv)
29
(v)
26
Question
30
30.
If
7
,
x
,
28
are in continued proportion, find
x
(i)
13
(ii)
14
(iii)
16
(iv)
11
(v)
15
Question
31
31.
Find the mean proportional between
1.4
and
22.4
(i)
7.6
(ii)
5.6
(iii)
3.6
(iv)
4.6
(v)
6.6
Question
32
32.
Find the mean proportional between
√
9
and
9
(i)
3
4
√
3
(ii)
3
√
3
(iii)
3
(iv)
9
(v)
3
√
6
Question
33
33.
Find two numbers whose mean proportional is
12
and third proportional is
324
(i)
4
and
36
(ii)
4
and
35
(iii)
4
and
34
(iv)
6
and
36
(v)
5
and
36
Assignment Key
1) (ii)
2) (iii)
3) (v)
4) (iv)
5) (v)
6) (iv)
7) (iv)
8) (i)
9) (i)
10) (i)
11) (iii)
12) (iii)
13) (iv)
14) (iv)
15) (ii)
16) (i)
17) (iii)
18) (ii)
19) (iii)
20) (i)
21) (iv)
22) (ii)
23) (iv)
24) (ii)
25) (i)
26) (ii)
27) (ii)
28) (iii)
29) (i)
30) (ii)
31) (ii)
32) (ii)
33) (i)
