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Finding the Fourth Proportional to 198.20, 296.88 and 101.72

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Solution

The fourth proportional to 198.20, 296.88 and 101.72 is: 152.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.20 : 296.88 = 101.72 : x
  2. Step 2: Convert to fraction form
    198.20/296.88 = 101.72/x
  3. Step 3: Cross multiply
    198.20x = 296.88 × 101.72
  4. Step 4: Simplify right side
    198.20x = 30,198.63
  5. Step 5: Solve for x
    x = 30,198.63/198.20
  6. Step 6: Final answer
    x = 152.36

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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.