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Finding the Fourth Proportional to 483.45, 724.51 and 239.43

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Solution

The fourth proportional to 483.45, 724.51 and 239.43 is: 358.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.45 : 724.51 = 239.43 : x
  2. Step 2: Convert to fraction form
    483.45/724.51 = 239.43/x
  3. Step 3: Cross multiply
    483.45x = 724.51 × 239.43
  4. Step 4: Simplify right side
    483.45x = 173,469.43
  5. Step 5: Solve for x
    x = 173,469.43/483.45
  6. Step 6: Final answer
    x = 358.82

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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.