# Find the unknown term of the proportion: 0,25/x=0,0,5/9

Find the unknown term of the proportion: 0,25/x=0,0,5/9
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Cameron Benitez
proportion rule; the product of the extreme terms of the proportion is equal to the product of the middle terms of the proportion; a and d are extreme; b and c are averages; a/b=c/d; => a•d=b•c; we multiply according to the rule with a cross;
Find the unknown term of the proportion:
0.25/x=0.05/9,
X•0.05=9•0.25
0.05x=2.25
X=2.25:0.05
X=45
Examination
0.25/x=0.05/9
0.25/45=5/100:9
25/100:45= 1/20•1/9
1/4• 1/45=1/180
1/180=1/180