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Finding the Fourth Proportional to 220.59, 330.90 and 134.47

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Solution

The fourth proportional to 220.59, 330.90 and 134.47 is: 201.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.59 : 330.90 = 134.47 : x
  2. Step 2: Convert to fraction form
    220.59/330.90 = 134.47/x
  3. Step 3: Cross multiply
    220.59x = 330.90 × 134.47
  4. Step 4: Simplify right side
    220.59x = 44,496.03
  5. Step 5: Solve for x
    x = 44,496.03/220.59
  6. Step 6: Final answer
    x = 201.71

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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.