What is the ratio of the fourth proporti

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Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Topic

Ratios

Question:

What is the ratio of the fourth proportional of 2, 5, 6 and the fourth proportional of 6, 8, 9?

Options:

3 : 2

5 : 3

3 : 4

5 : 4

Correct Answer:

5 : 4

Explanation:

Using direct formula for the fourth proportional,

d = \(\frac{b\; \times\; c}{a}\)

d₁ = \(\frac{5\; \times\; 6}{2}\) = 15

d₂ = \(\frac{8\; \times\; 9}{6}\) = 12

Thus, d₁ : d₂ = 15 : 12 = 5 : 4