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Finding the Fourth Proportional to 724.44, 1,000.55 and 667.04

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Solution

The fourth proportional to 724.44, 1,000.55 and 667.04 is: 921.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.44 : 1,000.55 = 667.04 : x
  2. Step 2: Convert to fraction form
    724.44/1,000.55 = 667.04/x
  3. Step 3: Cross multiply
    724.44x = 1,000.55 × 667.04
  4. Step 4: Simplify right side
    724.44x = 667,403.54
  5. Step 5: Solve for x
    x = 667,403.54/724.44
  6. Step 6: Final answer
    x = 921.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.