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Finding the Fourth Proportional to 198.05, 296.87 and 76.26

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Solution

The fourth proportional to 198.05, 296.87 and 76.26 is: 114.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.05 : 296.87 = 76.26 : x
  2. Step 2: Convert to fraction form
    198.05/296.87 = 76.26/x
  3. Step 3: Cross multiply
    198.05x = 296.87 × 76.26
  4. Step 4: Simplify right side
    198.05x = 22,638.92
  5. Step 5: Solve for x
    x = 22,638.92/198.05
  6. Step 6: Final answer
    x = 114.31

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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.