Ratio and Proportion Questions With Explanation

1. If a:b = 2:3 and b:c = 4:3, then find a:b:c

A. 8:12:9

B. 2:3:8

C. 2:3:9

D. 2:3:12

2. Find the fourth proportion to 2,3,6

A. 18

B. 12

C. 9

D. 4

3. If A:B:C = 2:3:4, then find 

A/B : B/C : C/A

A. 5:9:24

B. 6:9:24

C. 7:9:24

D. 8:9:24

4. If A:B = 2:3, B:C = 4:5 and C:D = 6:7, then find the value of A:B:C:D

A. 15:24:30:35

B. 16:24:30:35

C. 17:24:30:35

D. 18:24:30:35

5. If 2 : 9 :: x : 18, then find the value of x

A. 2

B. 3

C. 4

D. 6

6. if x:y = 1:3, then find the value of 

(7x+3y):(2x+y)

A. 14:5

B. 15:5

C. 16:5

D. 17:5

7. The salaries of A, B and C are of ratio 2:3:5. If the increments of 15%, 10% and 20% are done to their respective salaries, then find the new ratio of their salaries.

A. 20:33:60

B. 21:33:60

C. 22:33:60

D. 23:33:60

8. If Rs. 782 is divided into three parts, proportional to 

1/2 : 2/3 : 3/4

find the first part.

A. 190

B. 204

C. 220

D. 230

9. In a college, the ratio of the number of boys to girls is 8 : 5. If there are 200 girls, the total number of students in the college is

A. 420

B. 520

C. 620

D. 720

10. In a mixture 60 litres, the ratio of milk and water 2 : 1. If the this ratio is to be 1 : 2, then the quantity of water to be further added is

A. 20 liters

B. 30 liters

C. 50 liters

D. 60 liters