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Finding the Fourth Proportional to 396,838.44, 547,641.17 and 215,553.90

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Solution

The fourth proportional to 396,838.44, 547,641.17 and 215,553.90 is: 297,466.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,838.44 : 547,641.17 = 215,553.90 : x
  2. Step 2: Convert to fraction form
    396,838.44/547,641.17 = 215,553.90/x
  3. Step 3: Cross multiply
    396,838.44x = 547,641.17 × 215,553.90
  4. Step 4: Simplify right side
    396,838.44x = 118,046,189,994.06
  5. Step 5: Solve for x
    x = 118,046,189,994.06/396,838.44
  6. Step 6: Final answer
    x = 297,466.62

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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.