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Finding the Fourth Proportional to 238.99, 329.73 and 139.36

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Solution

The fourth proportional to 238.99, 329.73 and 139.36 is: 192.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.99 : 329.73 = 139.36 : x
  2. Step 2: Convert to fraction form
    238.99/329.73 = 139.36/x
  3. Step 3: Cross multiply
    238.99x = 329.73 × 139.36
  4. Step 4: Simplify right side
    238.99x = 45,951.17
  5. Step 5: Solve for x
    x = 45,951.17/238.99
  6. Step 6: Final answer
    x = 192.27

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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.