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Finding the Fourth Proportional to 396,558.72, 547,251.12 and 215,270.46

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Solution

The fourth proportional to 396,558.72, 547,251.12 and 215,270.46 is: 297,073.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,558.72 : 547,251.12 = 215,270.46 : x
  2. Step 2: Convert to fraction form
    396,558.72/547,251.12 = 215,270.46/x
  3. Step 3: Cross multiply
    396,558.72x = 547,251.12 × 215,270.46
  4. Step 4: Simplify right side
    396,558.72x = 117,807,000,337.92
  5. Step 5: Solve for x
    x = 117,807,000,337.92/396,558.72
  6. Step 6: Final answer
    x = 297,073.28

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1.5x scale

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.