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Finding the Fourth Proportional to 226.45, 339.68 and 72.39

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Solution

The fourth proportional to 226.45, 339.68 and 72.39 is: 108.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.45 : 339.68 = 72.39 : x
  2. Step 2: Convert to fraction form
    226.45/339.68 = 72.39/x
  3. Step 3: Cross multiply
    226.45x = 339.68 × 72.39
  4. Step 4: Simplify right side
    226.45x = 24,589.07
  5. Step 5: Solve for x
    x = 24,589.07/226.45
  6. Step 6: Final answer
    x = 108.58

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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.