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Finding the Fourth Proportional to 268,920.38, 403,380.84 and 69,241.20

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Solution

The fourth proportional to 268,920.38, 403,380.84 and 69,241.20 is: 103,861.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,920.38 : 403,380.84 = 69,241.20 : x
  2. Step 2: Convert to fraction form
    268,920.38/403,380.84 = 69,241.20/x
  3. Step 3: Cross multiply
    268,920.38x = 403,380.84 × 69,241.20
  4. Step 4: Simplify right side
    268,920.38x = 27,930,573,418.61
  5. Step 5: Solve for x
    x = 27,930,573,418.61/268,920.38
  6. Step 6: Final answer
    x = 103,861.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.