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Finding the Fourth Proportional to 238.69, 329.37 and 139.11

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Solution

The fourth proportional to 238.69, 329.37 and 139.11 is: 191.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.69 : 329.37 = 139.11 : x
  2. Step 2: Convert to fraction form
    238.69/329.37 = 139.11/x
  3. Step 3: Cross multiply
    238.69x = 329.37 × 139.11
  4. Step 4: Simplify right side
    238.69x = 45,818.66
  5. Step 5: Solve for x
    x = 45,818.66/238.69
  6. Step 6: Final answer
    x = 191.96

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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.