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Finding the Fourth Proportional to 483.10, 724.10 and 239.79

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Solution

The fourth proportional to 483.10, 724.10 and 239.79 is: 359.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.10 : 724.10 = 239.79 : x
  2. Step 2: Convert to fraction form
    483.10/724.10 = 239.79/x
  3. Step 3: Cross multiply
    483.10x = 724.10 × 239.79
  4. Step 4: Simplify right side
    483.10x = 173,627.12
  5. Step 5: Solve for x
    x = 173,627.12/483.10
  6. Step 6: Final answer
    x = 359.40

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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.