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Finding the Fourth Proportional to 238.87, 329.68 and 139.34

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Solution

The fourth proportional to 238.87, 329.68 and 139.34 is: 192.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.87 : 329.68 = 139.34 : x
  2. Step 2: Convert to fraction form
    238.87/329.68 = 139.34/x
  3. Step 3: Cross multiply
    238.87x = 329.68 × 139.34
  4. Step 4: Simplify right side
    238.87x = 45,936.91
  5. Step 5: Solve for x
    x = 45,936.91/238.87
  6. Step 6: Final answer
    x = 192.31

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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.