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Finding the Fourth Proportional to 226.11, 311.13 and 220.71

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Solution

The fourth proportional to 226.11, 311.13 and 220.71 is: 303.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.11 : 311.13 = 220.71 : x
  2. Step 2: Convert to fraction form
    226.11/311.13 = 220.71/x
  3. Step 3: Cross multiply
    226.11x = 311.13 × 220.71
  4. Step 4: Simplify right side
    226.11x = 68,669.50
  5. Step 5: Solve for x
    x = 68,669.50/226.11
  6. Step 6: Final answer
    x = 303.70

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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.