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Finding the Fourth Proportional to 220.87, 330.87 and 133.94

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Solution

The fourth proportional to 220.87, 330.87 and 133.94 is: 200.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.87 : 330.87 = 133.94 : x
  2. Step 2: Convert to fraction form
    220.87/330.87 = 133.94/x
  3. Step 3: Cross multiply
    220.87x = 330.87 × 133.94
  4. Step 4: Simplify right side
    220.87x = 44,316.73
  5. Step 5: Solve for x
    x = 44,316.73/220.87
  6. Step 6: Final answer
    x = 200.65

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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.