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Finding the Fourth Proportional to 226.15, 338.76 and 129.76

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Solution

The fourth proportional to 226.15, 338.76 and 129.76 is: 194.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.15 : 338.76 = 129.76 : x
  2. Step 2: Convert to fraction form
    226.15/338.76 = 129.76/x
  3. Step 3: Cross multiply
    226.15x = 338.76 × 129.76
  4. Step 4: Simplify right side
    226.15x = 43,957.50
  5. Step 5: Solve for x
    x = 43,957.50/226.15
  6. Step 6: Final answer
    x = 194.37

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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.