Finding the Fourth Proportional to 378,478.74, 567,715.42 and 138,609.09
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Solution
The fourth proportional to 378,478.74, 567,715.42 and 138,609.09 is: 207,912.65
Step by Step Solution
- Step 1: Write the proportion equation
378,478.74 : 567,715.42 = 138,609.09 : x - Step 2: Convert to fraction form
378,478.74/567,715.42 = 138,609.09/x - Step 3: Cross multiply
378,478.74x = 567,715.42 × 138,609.09 - Step 4: Simplify right side
378,478.74x = 78,690,517,745.17 - Step 5: Solve for x
x = 78,690,517,745.17/378,478.74 - Step 6: Final answer
x = 207,912.65
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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.