Question

Find $$x$$, when $$3 : 4 :: 2.4 : x$$.

Answer 1

We use the property: $$\text{Product of extremes} = \text{Product of means}$$.

$$3 \times x = 4 \times 2.4$$

$$3x = 9.6$$

$$x = \frac{9.6}{3} = 3.2$$