4) 1 3/10 : 3 2/3

\(1\frac{3}{10}=\frac{13}{10}\), \(3\frac{2}{3}=\frac{11}{3}\).

\(\frac{13}{10}:\frac{11}{3}=\frac{13}{10}\cdot\frac{3}{11}=\frac{39}{110}\).

Ответ: \(\frac{39}{110}\).