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Finding the Fourth Proportional to 728.02, 1,091.76 and 404.02

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Solution

The fourth proportional to 728.02, 1,091.76 and 404.02 is: 605.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.02 : 1,091.76 = 404.02 : x
  2. Step 2: Convert to fraction form
    728.02/1,091.76 = 404.02/x
  3. Step 3: Cross multiply
    728.02x = 1,091.76 × 404.02
  4. Step 4: Simplify right side
    728.02x = 441,092.88
  5. Step 5: Solve for x
    x = 441,092.88/728.02
  6. Step 6: Final answer
    x = 605.88

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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.