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
=
36
:
9
(i)
7
(ii)
1
(iii)
3
(iv)
4
(v)
5
Question
2
2.
Find the missing value in the equation
30
:
____
=
30
:
5
(i)
3
(ii)
4
(iii)
7
(iv)
6
(v)
5
Question
3
3.
Find the missing value in the equation
12
:
3
=
____
:
8
(i)
31
(ii)
29
(iii)
35
(iv)
33
(v)
32
Question
4
4.
Find the missing value in the equation
34
:
1
=
306
:
____
(i)
6
(ii)
8
(iii)
9
(iv)
10
(v)
12
Question
5
5.
Find the product of extremes of
19
:
6
and
17
:
11
(i)
209
(ii)
208
(iii)
102
(iv)
206
(v)
211
Question
6
6.
Find the product of extremes of
13
10
:
19
7
and
15
13
:
20
19
(i)
26
19
(ii)
28
19
(iii)
26
17
(iv)
24
19
(v)
285
91
Question
7
7.
Find the product of means of
7
:
11
and
18
:
3
(i)
196
(ii)
200
(iii)
197
(iv)
198
(v)
21
Question
8
8.
Find the product of means of
7
20
:
3
19
and
8
13
:
7
4
(i)
2
19
(ii)
49
80
(iii)
24
245
(iv)
24
247
(v)
22
247
Question
9
9.
Find the mean proportional of
18
and
2
(i)
18
(ii)
6
(iii)
36
(iv)
2
(v)
3
Question
10
10.
Find the third proportional of
50
and
10
(i)
2
(ii)
10
(iii)
100
(iv)
0
(v)
50
Question
11
11.
Find the fourth proportional of
30
,
5
and
18
(i)
6
(ii)
5
(iii)
3
(iv)
1
(v)
18
Question
12
12.
Which of the ratios is proportional to 8 : 2?
(i)
28
:
9
(ii)
27
:
7
(iii)
28
:
4
(iv)
28
:
7
(v)
29
:
7
Question
13
13.
Find the mean proportional of
50
and
2
(i)
100
(ii)
8
(iii)
2
(iv)
50
(v)
10
Question
14
14.
Find the third proportional of
72
and
12
(i)
2
(ii)
0
(iii)
12
(iv)
72
(v)
144
Question
15
15.
Find the fourth proportional of
30
,
5
and
12
(i)
5
(ii)
0
(iii)
12
(iv)
2
Question
16
16.
Which of the ratios is proportional to 30 : 5?
(i)
30
:
7
(ii)
29
:
5
(iii)
30
:
3
(iv)
30
:
5
(v)
31
:
5
Question
17
17.
If
a
:
b
::
c
:
d
,
then
(i)
ad = bc
(ii)
abc = bcd
(iii)
ac = bd
(iv)
ab = cd
Question
18
18.
The ratio 5 : 4 is proportional to which of the following ratios?
(i)
20
:
20
(ii)
30
:
12
(iii)
25
:
16
(iv)
15
:
24
(v)
10
:
8
Question
19
19.
Which of the following represents a proportion ?
(i)
44
:
30
::
132
:
60
(ii)
41
:
27
::
123
:
108
(iii)
43
:
29
::
86
:
87
(iv)
40
:
26
::
160
:
78
(v)
42
:
28
::
84
:
56
Question
20
20.
Which of the following does not represent a proportion ?
(i)
12
:
16
::
60
:
80
(ii)
21
:
24
::
42
:
48
(iii)
12
:
15
::
48
:
60
(iv)
5
:
6
::
10
:
18
(v)
12
:
14
::
36
:
42
Question
21
21.
If
a
:
b
::
c
:
d
,
then '
d
' is called
(i)
mean proportional
(ii)
second term
(iii)
third proportional
(iv)
extreme
(v)
first term
Question
22
22.
If
a
:
b
::
b
:
c
,
then '
b
' is called
(i)
fourth proportional
(ii)
first term
(iii)
mean proportional
(iv)
third proportional
(v)
extreme
Question
23
23.
If
a
:
b
::
b
:
c
,
then '
c
' is called
(i)
second term
(ii)
first term
(iii)
mean proportional
(iv)
third proportional
Question
24
24.
If
a
:
b
::
b
:
c
,
then the mean proportional is
(i)
ac
(ii)
a
(iii)
c
(iv)
bc
(v)
b
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
=
b
c
c
d
=
c
d
d
e
(ii)
a
b
=
b
c
=
c
d
(iii)
a
b
=
c
d
=
e
f
(iv)
ab
=
bc
=
cd
=
de
Question
26
26.
If
20
:
25
::
12
:
x
, find '
x
'
(i)
17
(ii)
16
(iii)
12
(iv)
15
(v)
14
Question
27
27.
Find the fourth proportional of 30, 24, 25
(i)
20
(ii)
21
(iii)
19
(iv)
22
(v)
17
Question
28
28.
Find the third proportional of 15 and 15
(i)
15
(ii)
17
(iii)
13
(iv)
16
(v)
14
Question
29
29.
Find the mean proportional of
9
and
36
(i)
15
(ii)
18
(iii)
19
(iv)
21
(v)
17
Question
30
30.
If
1
,
x
,
16
are in continued proportion, find
x
(i)
5
(ii)
6
(iii)
4
(iv)
1
(v)
3
Question
31
31.
Find the mean proportional between
5.7
and
22.8
(i)
9.4
(ii)
10.4
(iii)
11.4
(iv)
12.4
(v)
13.4
Question
32
32.
Find the mean proportional between
√
8
and
4
√
2
(i)
1
(ii)
3
(iii)
6
(iv)
4
(v)
5
Question
33
33.
Find two numbers whose mean proportional is
8
and third proportional is
64
(i)
4
and
16
(ii)
4
and
14
(iii)
4
and
15
(iv)
5
and
16
(v)
6
and
16
Assignment Key
1) (iv)
2) (v)
3) (v)
4) (iii)
5) (i)
6) (i)
7) (iv)
8) (iv)
9) (ii)
10) (i)
11) (iii)
12) (iv)
13) (v)
14) (i)
15) (iv)
16) (iv)
17) (i)
18) (v)
19) (v)
20) (iv)
21) (iv)
22) (iii)
23) (iv)
24) (v)
25) (ii)
26) (iv)
27) (i)
28) (i)
29) (ii)
30) (iii)
31) (iii)
32) (iv)
33) (i)
