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Finding the Fourth Proportional to 724.45, 999.70 and 462.55

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Solution

The fourth proportional to 724.45, 999.70 and 462.55 is: 638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.45 : 999.70 = 462.55 : x
  2. Step 2: Convert to fraction form
    724.45/999.70 = 462.55/x
  3. Step 3: Cross multiply
    724.45x = 999.70 × 462.55
  4. Step 4: Simplify right side
    724.45x = 462,411.24
  5. Step 5: Solve for x
    x = 462,411.24/724.45
  6. Step 6: Final answer
    x = 638.29

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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.