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Finding the Fourth Proportional to 198.59, 274.07 and 120.96

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Solution

The fourth proportional to 198.59, 274.07 and 120.96 is: 166.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.59 : 274.07 = 120.96 : x
  2. Step 2: Convert to fraction form
    198.59/274.07 = 120.96/x
  3. Step 3: Cross multiply
    198.59x = 274.07 × 120.96
  4. Step 4: Simplify right side
    198.59x = 33,151.81
  5. Step 5: Solve for x
    x = 33,151.81/198.59
  6. Step 6: Final answer
    x = 166.94

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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.