Помогите!!!! по теме пропорция

х : 4/25 = 3/4 : 4/5 4/5х = 4/25 * 3/4 4/5х = 3/25 х = 3/25 : 4/5 х = 3/25 * 5/4 х = 3/5 * 1/4  х = 3/20 15,04 : 2,688 = m : 26,88 2,688m = 15,04 * 26,88 2,688m = 404,2752 m = 404,2752 : 2,688 m = 150,4