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Finding the Fourth Proportional to 197.87, 296.72 and 106.55

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Solution

The fourth proportional to 197.87, 296.72 and 106.55 is: 159.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.87 : 296.72 = 106.55 : x
  2. Step 2: Convert to fraction form
    197.87/296.72 = 106.55/x
  3. Step 3: Cross multiply
    197.87x = 296.72 × 106.55
  4. Step 4: Simplify right side
    197.87x = 31,615.52
  5. Step 5: Solve for x
    x = 31,615.52/197.87
  6. Step 6: Final answer
    x = 159.78

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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.