Question

x : 3 :: 0.4 : 0.5 how solve it please tell anyone​

Answer 1

$\frac{x}{3} = \frac{0.4}{0.5} \\ \\ \frac{x}{3} = \frac{4}{5} \\ \\ x = \frac{(4 \times 3)}{5} \\ \\ x = \frac{12}{5} .$