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Finding the Fourth Proportional to 729.60, 1,092.56 and 404.61

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Solution

The fourth proportional to 729.60, 1,092.56 and 404.61 is: 605.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.60 : 1,092.56 = 404.61 : x
  2. Step 2: Convert to fraction form
    729.60/1,092.56 = 404.61/x
  3. Step 3: Cross multiply
    729.60x = 1,092.56 × 404.61
  4. Step 4: Simplify right side
    729.60x = 442,058.68
  5. Step 5: Solve for x
    x = 442,058.68/729.60
  6. Step 6: Final answer
    x = 605.89

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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.