The mean proportion between 0.02 and 0.32 is :
0.08
0.16
0.3
0.34
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The mean proportion between 9 and 16 is:
7
12
25
144
The mean proportion between x and y is 6. The third proportional to x and y is 48. Then x : y equals :
1 : 3
1 : 4
1 : 6
1 : 9