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Finding the Fourth Proportional to 397,042.43, 547,918.13 and 215,753.93

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Solution

The fourth proportional to 397,042.43, 547,918.13 and 215,753.93 is: 297,740.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,042.43 : 547,918.13 = 215,753.93 : x
  2. Step 2: Convert to fraction form
    397,042.43/547,918.13 = 215,753.93/x
  3. Step 3: Cross multiply
    397,042.43x = 547,918.13 × 215,753.93
  4. Step 4: Simplify right side
    397,042.43x = 118,215,487,126.16
  5. Step 5: Solve for x
    x = 118,215,487,126.16/397,042.43
  6. Step 6: Final answer
    x = 297,740.19

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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.