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Finding the Fourth Proportional to 724.55, 1,000.31 and 476.31

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Solution

The fourth proportional to 724.55, 1,000.31 and 476.31 is: 657.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.55 : 1,000.31 = 476.31 : x
  2. Step 2: Convert to fraction form
    724.55/1,000.31 = 476.31/x
  3. Step 3: Cross multiply
    724.55x = 1,000.31 × 476.31
  4. Step 4: Simplify right side
    724.55x = 476,457.66
  5. Step 5: Solve for x
    x = 476,457.66/724.55
  6. Step 6: Final answer
    x = 657.59

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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.