Find the ratio of mean proportion of 2 and 98 to the 4th proportion of 3, 4 and 9.

7 : 6 6 : 7 5 : 6 6 : 5

7 : 6

Mean proportion ⇒ \(\sqrt{2×98}=\sqrt{196}\) = 14 Fourth proportion ⇒ \(\frac{3 }{4}\) = \(\frac{9 }{x}\) ⇒ x = 12 Req. Ratio = 14 : 12 = 7 : 6