Find the mean proportional between 15 and 43. MCQ with Answer and Explanation

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Find the mean proportional between 15 and 43.

A. 28

B. 25

C. 50

D. 58

Answer: Option B

Solution (By JKSSB Mock Tests)

Mean proportional = √(15 × 43) = √(645) = 25.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 5:8 and b:c = 8:12, then a:b:c = ?

A. 5:9:12

B. 5:8:12

C. 10:16:24

D. 4:8:13

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 5:8, b:c = 8:12 ⇒ a:b:c = 5:8:12.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 24 and 31.

A. 55

B. 27

C. 30

D. 54

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Correct Answer: Option B

Explanation:
Mean proportional = √(24 × 31) = √(744) = 27.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 2:8 and b:c = 8:4, then a:b:c = ?

A. 2:9:4

B. 4:16:8

C. 1:8:5

D. 2:8:4

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:8, b:c = 8:4 ⇒ a:b:c = 2:8:4.

This question belongs to: Maths Ratio and Proportion

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