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Finding the Fourth Proportional to 396,910.40, 547,734.16 and 215,620.88

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Solution

The fourth proportional to 396,910.40, 547,734.16 and 215,620.88 is: 297,555.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,910.40 : 547,734.16 = 215,620.88 : x
  2. Step 2: Convert to fraction form
    396,910.40/547,734.16 = 215,620.88/x
  3. Step 3: Cross multiply
    396,910.40x = 547,734.16 × 215,620.88
  4. Step 4: Simplify right side
    396,910.40x = 118,102,921,585.26
  5. Step 5: Solve for x
    x = 118,102,921,585.26/396,910.40
  6. Step 6: Final answer
    x = 297,555.62

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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.