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Finding the Fourth Proportional to 439.52, 606.33 and 308.70

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Solution

The fourth proportional to 439.52, 606.33 and 308.70 is: 425.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.52 : 606.33 = 308.70 : x
  2. Step 2: Convert to fraction form
    439.52/606.33 = 308.70/x
  3. Step 3: Cross multiply
    439.52x = 606.33 × 308.70
  4. Step 4: Simplify right side
    439.52x = 187,174.07
  5. Step 5: Solve for x
    x = 187,174.07/439.52
  6. Step 6: Final answer
    x = 425.87

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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.