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Finding the Fourth Proportional to 724.20, 999.34 and 444.43

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Solution

The fourth proportional to 724.20, 999.34 and 444.43 is: 613.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.20 : 999.34 = 444.43 : x
  2. Step 2: Convert to fraction form
    724.20/999.34 = 444.43/x
  3. Step 3: Cross multiply
    724.20x = 999.34 × 444.43
  4. Step 4: Simplify right side
    724.20x = 444,136.68
  5. Step 5: Solve for x
    x = 444,136.68/724.20
  6. Step 6: Final answer
    x = 613.28

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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.