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Finding the Fourth Proportional to 238.80, 329.94 and 220.44

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Solution

The fourth proportional to 238.80, 329.94 and 220.44 is: 304.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.80 : 329.94 = 220.44 : x
  2. Step 2: Convert to fraction form
    238.80/329.94 = 220.44/x
  3. Step 3: Cross multiply
    238.80x = 329.94 × 220.44
  4. Step 4: Simplify right side
    238.80x = 72,731.97
  5. Step 5: Solve for x
    x = 72,731.97/238.80
  6. Step 6: Final answer
    x = 304.57

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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.