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Finding the Fourth Proportional to 728.76, 1,092.06 and 403.68

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Solution

The fourth proportional to 728.76, 1,092.06 and 403.68 is: 604.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.76 : 1,092.06 = 403.68 : x
  2. Step 2: Convert to fraction form
    728.76/1,092.06 = 403.68/x
  3. Step 3: Cross multiply
    728.76x = 1,092.06 × 403.68
  4. Step 4: Simplify right side
    728.76x = 440,842.78
  5. Step 5: Solve for x
    x = 440,842.78/728.76
  6. Step 6: Final answer
    x = 604.92

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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.