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Finding the Fourth Proportional to 724.30, 999.67 and 409.56

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Solution

The fourth proportional to 724.30, 999.67 and 409.56 is: 565.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.30 : 999.67 = 409.56 : x
  2. Step 2: Convert to fraction form
    724.30/999.67 = 409.56/x
  3. Step 3: Cross multiply
    724.30x = 999.67 × 409.56
  4. Step 4: Simplify right side
    724.30x = 409,424.85
  5. Step 5: Solve for x
    x = 409,424.85/724.30
  6. Step 6: Final answer
    x = 565.27

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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.