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Finding the Fourth Proportional to 198, 296.97 and 53.69

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Solution

The fourth proportional to 198, 296.97 and 53.69 is: 80.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    198 : 296.97 = 53.69 : x
  2. Step 2: Convert to fraction form
    198/296.97 = 53.69/x
  3. Step 3: Cross multiply
    198x = 296.97 × 53.69
  4. Step 4: Simplify right side
    198x = 15,944.32
  5. Step 5: Solve for x
    x = 15,944.32/198
  6. Step 6: Final answer
    x = 80.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.