Find the ratio of mean proportion of 4 and 16 to the 4th proportion of 4, 5 and 20 .
Answer & explanation
Correct answer: option 4
Mean proportion ⇒ \(\sqrt{4×16}=\sqrt{64}\) = 8
Fourth proportion(x) ⇒ \(\frac{4 }{5}\) = \(\frac{20 }{x}\) ⇒ x = 25
Req. Ratio = 8 : 25