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Finding the Fourth Proportional to 520.53, 717.96 and 324.15

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Solution

The fourth proportional to 520.53, 717.96 and 324.15 is: 447.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.53 : 717.96 = 324.15 : x
  2. Step 2: Convert to fraction form
    520.53/717.96 = 324.15/x
  3. Step 3: Cross multiply
    520.53x = 717.96 × 324.15
  4. Step 4: Simplify right side
    520.53x = 232,726.73
  5. Step 5: Solve for x
    x = 232,726.73/520.53
  6. Step 6: Final answer
    x = 447.10

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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.