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Finding the Fourth Proportional to 198.88, 298.50 and 102.76

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Solution

The fourth proportional to 198.88, 298.50 and 102.76 is: 154.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.88 : 298.50 = 102.76 : x
  2. Step 2: Convert to fraction form
    198.88/298.50 = 102.76/x
  3. Step 3: Cross multiply
    198.88x = 298.50 × 102.76
  4. Step 4: Simplify right side
    198.88x = 30,673.86
  5. Step 5: Solve for x
    x = 30,673.86/198.88
  6. Step 6: Final answer
    x = 154.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.