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Finding the Fourth Proportional to 226, 338.82 and 129.64

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Solution

The fourth proportional to 226, 338.82 and 129.64 is: 194.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    226 : 338.82 = 129.64 : x
  2. Step 2: Convert to fraction form
    226/338.82 = 129.64/x
  3. Step 3: Cross multiply
    226x = 338.82 × 129.64
  4. Step 4: Simplify right side
    226x = 43,924.62
  5. Step 5: Solve for x
    x = 43,924.62/226
  6. Step 6: Final answer
    x = 194.36

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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.