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Finding the Fourth Proportional to 349.20, 481.94 and 238.78

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Solution

The fourth proportional to 349.20, 481.94 and 238.78 is: 329.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.20 : 481.94 = 238.78 : x
  2. Step 2: Convert to fraction form
    349.20/481.94 = 238.78/x
  3. Step 3: Cross multiply
    349.20x = 481.94 × 238.78
  4. Step 4: Simplify right side
    349.20x = 115,077.63
  5. Step 5: Solve for x
    x = 115,077.63/349.20
  6. Step 6: Final answer
    x = 329.55

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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.