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Finding the Fourth Proportional to 226.55, 339.78 and 72.49

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Solution

The fourth proportional to 226.55, 339.78 and 72.49 is: 108.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.55 : 339.78 = 72.49 : x
  2. Step 2: Convert to fraction form
    226.55/339.78 = 72.49/x
  3. Step 3: Cross multiply
    226.55x = 339.78 × 72.49
  4. Step 4: Simplify right side
    226.55x = 24,630.65
  5. Step 5: Solve for x
    x = 24,630.65/226.55
  6. Step 6: Final answer
    x = 108.72

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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.