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Finding the Fourth Proportional to 396,908.90, 547,732.10 and 215,619.38

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Solution

The fourth proportional to 396,908.90, 547,732.10 and 215,619.38 is: 297,553.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,908.90 : 547,732.10 = 215,619.38 : x
  2. Step 2: Convert to fraction form
    396,908.90/547,732.10 = 215,619.38/x
  3. Step 3: Cross multiply
    396,908.90x = 547,732.10 × 215,619.38
  4. Step 4: Simplify right side
    396,908.90x = 118,101,654,730.00
  5. Step 5: Solve for x
    x = 118,101,654,730.00/396,908.90
  6. Step 6: Final answer
    x = 297,553.56

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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.