Question

1/2:1/3:: 1/3:1/4 are in proportion ​,How?​

Answer 1

Step-by-step explanation:

$to \: find \: how \: it \: is \: in \: proportion \: apply \: the \: formula \: of \: proportion \\ product \: of \: mean = product \: of \: extreme \\ here \: product \: of \: mean = \frac{1}{3} \times \frac{1}{3} = \frac{1}{9 } \\ and \: product \: of \: extreme \: = \frac{1}{2} \times \frac{1}{4} = \frac{1}{8} \\ here \: product \: of \: mean \: is \: not \: equal \: to \: product \: of \: extreme \: \\ so \: they \: are \: not \: in \: proportion$