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Finding the Fourth Proportional to 198.99, 298.62 and 107.76

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Solution

The fourth proportional to 198.99, 298.62 and 107.76 is: 161.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.99 : 298.62 = 107.76 : x
  2. Step 2: Convert to fraction form
    198.99/298.62 = 107.76/x
  3. Step 3: Cross multiply
    198.99x = 298.62 × 107.76
  4. Step 4: Simplify right side
    198.99x = 32,179.29
  5. Step 5: Solve for x
    x = 32,179.29/198.99
  6. Step 6: Final answer
    x = 161.71

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