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Finding the Fourth Proportional to 225.89, 338.80 and 71.83

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Solution

The fourth proportional to 225.89, 338.80 and 71.83 is: 107.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.89 : 338.80 = 71.83 : x
  2. Step 2: Convert to fraction form
    225.89/338.80 = 71.83/x
  3. Step 3: Cross multiply
    225.89x = 338.80 × 71.83
  4. Step 4: Simplify right side
    225.89x = 24,334.48
  5. Step 5: Solve for x
    x = 24,334.48/225.89
  6. Step 6: Final answer
    x = 107.73

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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.