Finding the Fourth Proportional to 397,638.72, 548,560.62 and 236,402.28
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Solution
The fourth proportional to 397,638.72, 548,560.62 and 236,402.28 is: 326,127.65
Step by Step Solution
- Step 1: Write the proportion equation
397,638.72 : 548,560.62 = 236,402.28 : x - Step 2: Convert to fraction form
397,638.72/548,560.62 = 236,402.28/x - Step 3: Cross multiply
397,638.72x = 548,560.62 × 236,402.28 - Step 4: Simplify right side
397,638.72x = 129,680,981,286.21 - Step 5: Solve for x
x = 129,680,981,286.21/397,638.72 - Step 6: Final answer
x = 326,127.65
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.