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Finding the Fourth Proportional to 396,502.54, 547,158.84 and 215,210.59

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Solution

The fourth proportional to 396,502.54, 547,158.84 and 215,210.59 is: 296,982.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,502.54 : 547,158.84 = 215,210.59 : x
  2. Step 2: Convert to fraction form
    396,502.54/547,158.84 = 215,210.59/x
  3. Step 3: Cross multiply
    396,502.54x = 547,158.84 × 215,210.59
  4. Step 4: Simplify right side
    396,502.54x = 117,754,376,780.12
  5. Step 5: Solve for x
    x = 117,754,376,780.12/396,502.54
  6. Step 6: Final answer
    x = 296,982.65

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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.