X : 2 4/7 = 1 5/9 : 2 1/4 РЕШИТЬ В ПРОПОРЦИЯХ
2 1/4х = 2 4/7 * 1 5/9 9/4х = 18/7 * 14/9 9/4х = 4 х = 4 : 9/4 х = 16/9 х = 1 7/9