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Finding the Fourth Proportional to 198.17, 272.86 and 170.12

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Solution

The fourth proportional to 198.17, 272.86 and 170.12 is: 234.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.17 : 272.86 = 170.12 : x
  2. Step 2: Convert to fraction form
    198.17/272.86 = 170.12/x
  3. Step 3: Cross multiply
    198.17x = 272.86 × 170.12
  4. Step 4: Simplify right side
    198.17x = 46,418.94
  5. Step 5: Solve for x
    x = 46,418.94/198.17
  6. Step 6: Final answer
    x = 234.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.