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Finding the Fourth Proportional to 198.44, 296.31 and 170.72

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Solution

The fourth proportional to 198.44, 296.31 and 170.72 is: 254.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.44 : 296.31 = 170.72 : x
  2. Step 2: Convert to fraction form
    198.44/296.31 = 170.72/x
  3. Step 3: Cross multiply
    198.44x = 296.31 × 170.72
  4. Step 4: Simplify right side
    198.44x = 50,585.19
  5. Step 5: Solve for x
    x = 50,585.19/198.44
  6. Step 6: Final answer
    x = 254.91

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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.