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Finding the Fourth Proportional to 724.12, 998.88 and 461.68

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Solution

The fourth proportional to 724.12, 998.88 and 461.68 is: 636.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.12 : 998.88 = 461.68 : x
  2. Step 2: Convert to fraction form
    724.12/998.88 = 461.68/x
  3. Step 3: Cross multiply
    724.12x = 998.88 × 461.68
  4. Step 4: Simplify right side
    724.12x = 461,162.92
  5. Step 5: Solve for x
    x = 461,162.92/724.12
  6. Step 6: Final answer
    x = 636.86

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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.