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Finding the Fourth Proportional to 197.92, 296.73 and 120.87

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Solution

The fourth proportional to 197.92, 296.73 and 120.87 is: 181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.92 : 296.73 = 120.87 : x
  2. Step 2: Convert to fraction form
    197.92/296.73 = 120.87/x
  3. Step 3: Cross multiply
    197.92x = 296.73 × 120.87
  4. Step 4: Simplify right side
    197.92x = 35,865.76
  5. Step 5: Solve for x
    x = 35,865.76/197.92
  6. Step 6: Final answer
    x = 181.21

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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.