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Finding the Fourth Proportional to 728.76, 1,092.46 and 363.21

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Solution

The fourth proportional to 728.76, 1,092.46 and 363.21 is: 544.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.76 : 1,092.46 = 363.21 : x
  2. Step 2: Convert to fraction form
    728.76/1,092.46 = 363.21/x
  3. Step 3: Cross multiply
    728.76x = 1,092.46 × 363.21
  4. Step 4: Simplify right side
    728.76x = 396,792.40
  5. Step 5: Solve for x
    x = 396,792.40/728.76
  6. Step 6: Final answer
    x = 544.48

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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.