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Finding the Fourth Proportional to 724.56, 1,000.20 and 462.52

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Solution

The fourth proportional to 724.56, 1,000.20 and 462.52 is: 638.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.56 : 1,000.20 = 462.52 : x
  2. Step 2: Convert to fraction form
    724.56/1,000.20 = 462.52/x
  3. Step 3: Cross multiply
    724.56x = 1,000.20 × 462.52
  4. Step 4: Simplify right side
    724.56x = 462,612.50
  5. Step 5: Solve for x
    x = 462,612.50/724.56
  6. Step 6: Final answer
    x = 638.47

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Double scale
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1.5x scale

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.