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Finding the Fourth Proportional to 724.72, 999.61 and 462.61

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Solution

The fourth proportional to 724.72, 999.61 and 462.61 is: 638.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.72 : 999.61 = 462.61 : x
  2. Step 2: Convert to fraction form
    724.72/999.61 = 462.61/x
  3. Step 3: Cross multiply
    724.72x = 999.61 × 462.61
  4. Step 4: Simplify right side
    724.72x = 462,429.58
  5. Step 5: Solve for x
    x = 462,429.58/724.72
  6. Step 6: Final answer
    x = 638.08

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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.