Finding the Fourth Proportional to 721,420.92, 1,081,096.20 and 405,212.31
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Solution
The fourth proportional to 721,420.92, 1,081,096.20 and 405,212.31 is: 607,237.02
Step by Step Solution
- Step 1: Write the proportion equation
721,420.92 : 1,081,096.20 = 405,212.31 : x - Step 2: Convert to fraction form
721,420.92/1,081,096.20 = 405,212.31/x - Step 3: Cross multiply
721,420.92x = 1,081,096.20 × 405,212.31 - Step 4: Simplify right side
721,420.92x = 438,073,488,534.22 - Step 5: Solve for x
x = 438,073,488,534.22/721,420.92 - Step 6: Final answer
x = 607,237.02
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.