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Finding the Fourth Proportional to 396,497.57, 547,167.11 and 215,209.49

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Solution

The fourth proportional to 396,497.57, 547,167.11 and 215,209.49 is: 296,989.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,497.57 : 547,167.11 = 215,209.49 : x
  2. Step 2: Convert to fraction form
    396,497.57/547,167.11 = 215,209.49/x
  3. Step 3: Cross multiply
    396,497.57x = 547,167.11 × 215,209.49
  4. Step 4: Simplify right side
    396,497.57x = 117,755,550,875.99
  5. Step 5: Solve for x
    x = 117,755,550,875.99/396,497.57
  6. Step 6: Final answer
    x = 296,989.34

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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.