Решите уравнение: x:9/16=32/45.

\[x\ :\frac{9}{16} = \frac{32}{45}\]

\[x = \frac{32}{45} \cdot \frac{9}{16} = \frac{32 \cdot 9}{45 \cdot 16}\]

\[x = \frac{2}{5}.\]