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Finding the Fourth Proportional to 482.90, 724.38 and 239.18

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Solution

The fourth proportional to 482.90, 724.38 and 239.18 is: 358.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.90 : 724.38 = 239.18 : x
  2. Step 2: Convert to fraction form
    482.90/724.38 = 239.18/x
  3. Step 3: Cross multiply
    482.90x = 724.38 × 239.18
  4. Step 4: Simplify right side
    482.90x = 173,253.59
  5. Step 5: Solve for x
    x = 173,253.59/482.90
  6. Step 6: Final answer
    x = 358.78

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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.