485 4) 46 d³c 23 dc2 15 a 5a3

4) $$ \frac{46d^3c}{15a} : \frac{23dc^2}{5a^3} = \frac{46d^3c}{15a} \cdot \frac{5a^3}{23dc^2} = \frac{46d^3c \cdot 5a^3}{15a \cdot 23dc^2} = \frac{2d^2 \cdot a^2}{3c} = \frac{2a^2d^2}{3c} $$

Ответ: $$ \frac{2a^2d^2}{3c} $$