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Finding the Fourth Proportional to 232.78, 349.77 and 218.20

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Solution

The fourth proportional to 232.78, 349.77 and 218.20 is: 327.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.78 : 349.77 = 218.20 : x
  2. Step 2: Convert to fraction form
    232.78/349.77 = 218.20/x
  3. Step 3: Cross multiply
    232.78x = 349.77 × 218.20
  4. Step 4: Simplify right side
    232.78x = 76,319.81
  5. Step 5: Solve for x
    x = 76,319.81/232.78
  6. Step 6: Final answer
    x = 327.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.