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Finding the Fourth Proportional to 144.27, 200.48 and 142.79

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Solution

The fourth proportional to 144.27, 200.48 and 142.79 is: 198.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.27 : 200.48 = 142.79 : x
  2. Step 2: Convert to fraction form
    144.27/200.48 = 142.79/x
  3. Step 3: Cross multiply
    144.27x = 200.48 × 142.79
  4. Step 4: Simplify right side
    144.27x = 28,624.82
  5. Step 5: Solve for x
    x = 28,624.82/144.27
  6. Step 6: Final answer
    x = 198.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.