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Find the ratio of mean proportion of 9 and 49 to the 4th proportion of 3, 5 and 9. |
5 : 2 4 : 3 7 : 5 8 : 9 |
7 : 5 |
Mean proportion ⇒ \(\sqrt{9×49}=\sqrt{441}\) = 21 Fourth proportion(x) ⇒ \(\frac{3 }{5}\) = \(\frac{9 }{x}\) ⇒ x = 15 Req. Ratio = 21 : 15 = 7 : 5 |
