2) \( 3 \frac{1}{6} : 1 \frac{5}{19} \)

\( 3 \frac{1}{6} : 1 \frac{5}{19} = \frac{19}{6} : \frac{24}{19} = \frac{19}{6} \times \frac{19}{24} = \frac{361}{144} \).