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Finding the Fourth Proportional to 231.48, 318.79 and 226.44

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Solution

The fourth proportional to 231.48, 318.79 and 226.44 is: 311.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.48 : 318.79 = 226.44 : x
  2. Step 2: Convert to fraction form
    231.48/318.79 = 226.44/x
  3. Step 3: Cross multiply
    231.48x = 318.79 × 226.44
  4. Step 4: Simplify right side
    231.48x = 72,184.65
  5. Step 5: Solve for x
    x = 72,184.65/231.48
  6. Step 6: Final answer
    x = 311.85

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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.