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Finding the Fourth Proportional to 308.88, 462.78 and 239.49

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Solution

The fourth proportional to 308.88, 462.78 and 239.49 is: 358.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.88 : 462.78 = 239.49 : x
  2. Step 2: Convert to fraction form
    308.88/462.78 = 239.49/x
  3. Step 3: Cross multiply
    308.88x = 462.78 × 239.49
  4. Step 4: Simplify right side
    308.88x = 110,831.18
  5. Step 5: Solve for x
    x = 110,831.18/308.88
  6. Step 6: Final answer
    x = 358.82

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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.