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Finding the Fourth Proportional to 226.85, 312.38 and 221.73

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Solution

The fourth proportional to 226.85, 312.38 and 221.73 is: 305.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.85 : 312.38 = 221.73 : x
  2. Step 2: Convert to fraction form
    226.85/312.38 = 221.73/x
  3. Step 3: Cross multiply
    226.85x = 312.38 × 221.73
  4. Step 4: Simplify right side
    226.85x = 69,262.91
  5. Step 5: Solve for x
    x = 69,262.91/226.85
  6. Step 6: Final answer
    x = 305.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.