Question

Найдите неизвестный член пропорции.
6 1/2:x=6 5/6 :4,1
0,38:x=4 3/4:1 7/8
10,4:3 5/7=x:5/11
1,25:1,4=0,75:x
3 1/2:0,4=x:1 1/7
15,6:2,88=x:14 2 /5

Answer 1

6 5/6х = 4,1* 6,5
41/6х = 26,65
х = 3,9
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4 3/4х = 0,38 * 1 7/8
19/4х = 0,38 * 15/8
19/4х = 0,7125
х = 0,15
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3 5/7х = 10,4 * 5/11
26/7х = 52/5 * 5/11
26/7х = 52/11
х = 14/11
х = 1ц.3/11
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1,25х = 1,4 * 0,75
1,25х = 1,05
      х = 0,84
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0,4х = 3 1/2 * 1 1/7
0,4х = 7/2 * 8/7
0,4х = 4
х = 10
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2,88х = 15,6 * 14 2/5
2,88х = 15,6 * 14,4
2,88х = 224,64
х = 78
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