\[\boxed{\mathbf{824\ (824).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[x_{1} = 0,2;\ \ \ \ \ \ q = - 5\]
\[x_{2} = x_{1} \cdot q = 0,2 \cdot ( - 5) = - 1,\ \ \]
\[x_{3} = x_{2} \cdot q = - 1 \cdot ( - 5) = 5,\]
\[x_{4} = x_{3} \cdot q = 5 \cdot ( - 5) = - 25\]
\[Ответ:0,2;\ - 1;\ \ \ 5;\ - 25.\]