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Finding the Fourth Proportional to 439.06, 605.90 and 252.55

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Solution

The fourth proportional to 439.06, 605.90 and 252.55 is: 348.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.06 : 605.90 = 252.55 : x
  2. Step 2: Convert to fraction form
    439.06/605.90 = 252.55/x
  3. Step 3: Cross multiply
    439.06x = 605.90 × 252.55
  4. Step 4: Simplify right side
    439.06x = 153,020.05
  5. Step 5: Solve for x
    x = 153,020.05/439.06
  6. Step 6: Final answer
    x = 348.52

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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.