(1)
1x6=6
(2)
2x3=6
(3)
6=6
Therefore, the ratios are equal.
2-3.
"X" AS THE UNKNOWN FACTOR
proportion, if one factor of either ratio is unknown, it may be solved by substituting "X"
for the unknown factor in the proportion.
EXAMPLE:
1=X
2 6
1
X
2
6
Cross multiply:
2 (X) = 1 (6)
2X = 6
2X = 6
2 2
X=3
2-4.
RULES FOR RATIO AND PROPORTION OPERATIONS
a. The numerators must have the same units.
b. The denominators must have the same units.
c. Three of the four variables must be known.
2-5.
SETTING UP THE PROPORTION
administered.
MD0904
2-3