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Finding the Fourth Proportional to 396,679.29, 547,402.46 and 215,387.29

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Solution

The fourth proportional to 396,679.29, 547,402.46 and 215,387.29 is: 297,226.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,679.29 : 547,402.46 = 215,387.29 : x
  2. Step 2: Convert to fraction form
    396,679.29/547,402.46 = 215,387.29/x
  3. Step 3: Cross multiply
    396,679.29x = 547,402.46 × 215,387.29
  4. Step 4: Simplify right side
    396,679.29x = 117,903,532,398.73
  5. Step 5: Solve for x
    x = 117,903,532,398.73/396,679.29
  6. Step 6: Final answer
    x = 297,226.34

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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.