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Finding the Fourth Proportional to 203.79, 281.28 and 144.87

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Solution

The fourth proportional to 203.79, 281.28 and 144.87 is: 199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.79 : 281.28 = 144.87 : x
  2. Step 2: Convert to fraction form
    203.79/281.28 = 144.87/x
  3. Step 3: Cross multiply
    203.79x = 281.28 × 144.87
  4. Step 4: Simplify right side
    203.79x = 40,747.98
  5. Step 5: Solve for x
    x = 40,747.98/203.79
  6. Step 6: Final answer
    x = 199.95

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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.