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Finding the Fourth Proportional to 520.73, 718.49 and 324.12

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Solution

The fourth proportional to 520.73, 718.49 and 324.12 is: 447.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.73 : 718.49 = 324.12 : x
  2. Step 2: Convert to fraction form
    520.73/718.49 = 324.12/x
  3. Step 3: Cross multiply
    520.73x = 718.49 × 324.12
  4. Step 4: Simplify right side
    520.73x = 232,875.36
  5. Step 5: Solve for x
    x = 232,875.36/520.73
  6. Step 6: Final answer
    x = 447.21

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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.