What is the ratio between the fourth proportional of 3, 4, 9 and the mean proportional between 2 and 98 ?
Fourth proportional = $$\frac{3}{4}=\frac{9}{x}$$
             = 12
Mean of 2, 98 = $$\sqrt{2\times98}=14$$Â Â Â
Required ratio = 12 : 14 = 6 : 7
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