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Finding the Fourth Proportional to 227.13, 311.55 and 225.18

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Solution

The fourth proportional to 227.13, 311.55 and 225.18 is: 308.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.13 : 311.55 = 225.18 : x
  2. Step 2: Convert to fraction form
    227.13/311.55 = 225.18/x
  3. Step 3: Cross multiply
    227.13x = 311.55 × 225.18
  4. Step 4: Simplify right side
    227.13x = 70,154.83
  5. Step 5: Solve for x
    x = 70,154.83/227.13
  6. Step 6: Final answer
    x = 308.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.