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Finding the Fourth Proportional to 197.99, 273.28 and 120.43

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Solution

The fourth proportional to 197.99, 273.28 and 120.43 is: 166.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.99 : 273.28 = 120.43 : x
  2. Step 2: Convert to fraction form
    197.99/273.28 = 120.43/x
  3. Step 3: Cross multiply
    197.99x = 273.28 × 120.43
  4. Step 4: Simplify right side
    197.99x = 32,910.51
  5. Step 5: Solve for x
    x = 32,910.51/197.99
  6. Step 6: Final answer
    x = 166.22

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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.