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Finding the Fourth Proportional to 439.42, 606.34 and 252.90

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Solution

The fourth proportional to 439.42, 606.34 and 252.90 is: 348.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.42 : 606.34 = 252.90 : x
  2. Step 2: Convert to fraction form
    439.42/606.34 = 252.90/x
  3. Step 3: Cross multiply
    439.42x = 606.34 × 252.90
  4. Step 4: Simplify right side
    439.42x = 153,340.35
  5. Step 5: Solve for x
    x = 153,340.35/439.42
  6. Step 6: Final answer
    x = 348.96

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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.