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Finding the Fourth Proportional to 198.56, 275.12 and 194.24

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Solution

The fourth proportional to 198.56, 275.12 and 194.24 is: 269.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.56 : 275.12 = 194.24 : x
  2. Step 2: Convert to fraction form
    198.56/275.12 = 194.24/x
  3. Step 3: Cross multiply
    198.56x = 275.12 × 194.24
  4. Step 4: Simplify right side
    198.56x = 53,439.31
  5. Step 5: Solve for x
    x = 53,439.31/198.56
  6. Step 6: Final answer
    x = 269.13

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.