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Finding the Fourth Proportional to 439.20, 606.07 and 252.55

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Solution

The fourth proportional to 439.20, 606.07 and 252.55 is: 348.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.20 : 606.07 = 252.55 : x
  2. Step 2: Convert to fraction form
    439.20/606.07 = 252.55/x
  3. Step 3: Cross multiply
    439.20x = 606.07 × 252.55
  4. Step 4: Simplify right side
    439.20x = 153,062.98
  5. Step 5: Solve for x
    x = 153,062.98/439.20
  6. Step 6: Final answer
    x = 348.50

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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.