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Finding the Fourth Proportional to 225.21, 337.91 and 129

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Solution

The fourth proportional to 225.21, 337.91 and 129 is: 193.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.21 : 337.91 = 129 : x
  2. Step 2: Convert to fraction form
    225.21/337.91 = 129/x
  3. Step 3: Cross multiply
    225.21x = 337.91 × 129
  4. Step 4: Simplify right side
    225.21x = 43,589.75
  5. Step 5: Solve for x
    x = 43,589.75/225.21
  6. Step 6: Final answer
    x = 193.55

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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.