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Finding the Fourth Proportional to 197.92, 273.36 and 154.80

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Solution

The fourth proportional to 197.92, 273.36 and 154.80 is: 213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.92 : 273.36 = 154.80 : x
  2. Step 2: Convert to fraction form
    197.92/273.36 = 154.80/x
  3. Step 3: Cross multiply
    197.92x = 273.36 × 154.80
  4. Step 4: Simplify right side
    197.92x = 42,316.13
  5. Step 5: Solve for x
    x = 42,316.13/197.92
  6. Step 6: Final answer
    x = 213.80

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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.