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Finding the Fourth Proportional to 226.54, 339.85 and 72.42

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Solution

The fourth proportional to 226.54, 339.85 and 72.42 is: 108.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.54 : 339.85 = 72.42 : x
  2. Step 2: Convert to fraction form
    226.54/339.85 = 72.42/x
  3. Step 3: Cross multiply
    226.54x = 339.85 × 72.42
  4. Step 4: Simplify right side
    226.54x = 24,611.94
  5. Step 5: Solve for x
    x = 24,611.94/226.54
  6. Step 6: Final answer
    x = 108.64

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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.