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Finding the Fourth Proportional to 198.90, 296.90 and 185.22

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Solution

The fourth proportional to 198.90, 296.90 and 185.22 is: 276.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.90 : 296.90 = 185.22 : x
  2. Step 2: Convert to fraction form
    198.90/296.90 = 185.22/x
  3. Step 3: Cross multiply
    198.90x = 296.90 × 185.22
  4. Step 4: Simplify right side
    198.90x = 54,991.59
  5. Step 5: Solve for x
    x = 54,991.59/198.90
  6. Step 6: Final answer
    x = 276.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.