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Finding the Fourth Proportional to 198.19, 297.15 and 106.80

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Solution

The fourth proportional to 198.19, 297.15 and 106.80 is: 160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.19 : 297.15 = 106.80 : x
  2. Step 2: Convert to fraction form
    198.19/297.15 = 106.80/x
  3. Step 3: Cross multiply
    198.19x = 297.15 × 106.80
  4. Step 4: Simplify right side
    198.19x = 31,735.62
  5. Step 5: Solve for x
    x = 31,735.62/198.19
  6. Step 6: Final answer
    x = 160.13

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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.