Найдите неизвестный член пропорции: 2 2/3:3 1/3=x:3,5.

\[2\frac{2}{3}\ :3\frac{1}{3} = x\ :3,5\]

\[3\frac{1}{3}x = 2\frac{2}{3} \cdot 3,5\]

\[\frac{10}{3}x = \frac{8}{3} \cdot \frac{35}{10}\]

\[x = \frac{8}{3} \cdot \frac{7}{2}\ :\frac{10}{3}\]

\[x = \frac{8 \cdot 7 \cdot 3}{3 \cdot 2 \cdot 10} = \frac{2 \cdot 7 \cdot 1}{1 \cdot 1 \cdot 5} = \frac{14}{5}\]

\[x = 2,8.\]

\[Ответ:x = 2,8.\]