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Finding the Fourth Proportional to 238.86, 329.52 and 154.96

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Solution

The fourth proportional to 238.86, 329.52 and 154.96 is: 213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.86 : 329.52 = 154.96 : x
  2. Step 2: Convert to fraction form
    238.86/329.52 = 154.96/x
  3. Step 3: Cross multiply
    238.86x = 329.52 × 154.96
  4. Step 4: Simplify right side
    238.86x = 51,062.42
  5. Step 5: Solve for x
    x = 51,062.42/238.86
  6. Step 6: Final answer
    x = 213.78

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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.