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Finding the Fourth Proportional to 396,817.76, 547,614.20 and 215,530.04

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Solution

The fourth proportional to 396,817.76, 547,614.20 and 215,530.04 is: 297,434.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,817.76 : 547,614.20 = 215,530.04 : x
  2. Step 2: Convert to fraction form
    396,817.76/547,614.20 = 215,530.04/x
  3. Step 3: Cross multiply
    396,817.76x = 547,614.20 × 215,530.04
  4. Step 4: Simplify right side
    396,817.76x = 118,027,310,430.57
  5. Step 5: Solve for x
    x = 118,027,310,430.57/396,817.76
  6. Step 6: Final answer
    x = 297,434.55

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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.