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Finding the Fourth Proportional to 225.62, 338.42 and 103.86

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Solution

The fourth proportional to 225.62, 338.42 and 103.86 is: 155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.62 : 338.42 = 103.86 : x
  2. Step 2: Convert to fraction form
    225.62/338.42 = 103.86/x
  3. Step 3: Cross multiply
    225.62x = 338.42 × 103.86
  4. Step 4: Simplify right side
    225.62x = 35,148.30
  5. Step 5: Solve for x
    x = 35,148.30/225.62
  6. Step 6: Final answer
    x = 155.79

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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.