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Finding the Fourth Proportional to 487.52, 729.44 and 282.18

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Solution

The fourth proportional to 487.52, 729.44 and 282.18 is: 422.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.52 : 729.44 = 282.18 : x
  2. Step 2: Convert to fraction form
    487.52/729.44 = 282.18/x
  3. Step 3: Cross multiply
    487.52x = 729.44 × 282.18
  4. Step 4: Simplify right side
    487.52x = 205,833.38
  5. Step 5: Solve for x
    x = 205,833.38/487.52
  6. Step 6: Final answer
    x = 422.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.