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Finding the Fourth Proportional to 481.05, 721.55 and 134.38

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Solution

The fourth proportional to 481.05, 721.55 and 134.38 is: 201.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.05 : 721.55 = 134.38 : x
  2. Step 2: Convert to fraction form
    481.05/721.55 = 134.38/x
  3. Step 3: Cross multiply
    481.05x = 721.55 × 134.38
  4. Step 4: Simplify right side
    481.05x = 96,960.42
  5. Step 5: Solve for x
    x = 96,960.42/481.05
  6. Step 6: Final answer
    x = 201.56

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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.