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Finding the Fourth Proportional to 225.44, 311.24 and 142.62

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Solution

The fourth proportional to 225.44, 311.24 and 142.62 is: 196.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.44 : 311.24 = 142.62 : x
  2. Step 2: Convert to fraction form
    225.44/311.24 = 142.62/x
  3. Step 3: Cross multiply
    225.44x = 311.24 × 142.62
  4. Step 4: Simplify right side
    225.44x = 44,386.78
  5. Step 5: Solve for x
    x = 44,386.78/225.44
  6. Step 6: Final answer
    x = 196.89

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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.