Find the mean proportional between 4 and 66. MCQ with Answer and Explanation

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Find the mean proportional between 4 and 66.

A. 16

B. 19

C. 32

D. 70

Answer: Option A

Solution (By JKSSB Mock Tests)

Mean proportional = √(4 × 66) = √(264) = 16.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 7:4 and b:c = 4:8, then a:b:c = ?

A. 14:8:16

B. 7:5:8

C. 7:4:8

D. 6:4:9

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 7:4, b:c = 4:8 ⇒ a:b:c = 7:4:8.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 12:6 and their sum is 224. Find the numbers.

A. 288 and 144

B. 132 and 88

C. 156 and 45

D. 144 and 72

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Correct Answer: Option D

Explanation:
Numbers = 12k and 6k. 12k + 6k = 224 ⇒ k = 12. Thus, numbers are 144 and 72.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:4 and b:c = 4:5, then a:b:c = ?

A. 3:5:5

B. 3:4:5

C. 2:4:6

D. 6:8:10

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:4, b:c = 4:5 ⇒ a:b:c = 3:4:5.

This question belongs to: Maths Ratio and Proportion

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