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What is the ratio of the fourth proportional of 2, 5, 6 and the fourth proportional of 6, 8, 9? |
3 : 2 5 : 3 3 : 4 5 : 4 |
5 : 4 |
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 |
