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Finding the Fourth Proportional to 198.05, 273.38 and 154.51

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Solution

The fourth proportional to 198.05, 273.38 and 154.51 is: 213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.05 : 273.38 = 154.51 : x
  2. Step 2: Convert to fraction form
    198.05/273.38 = 154.51/x
  3. Step 3: Cross multiply
    198.05x = 273.38 × 154.51
  4. Step 4: Simplify right side
    198.05x = 42,238.49
  5. Step 5: Solve for x
    x = 42,238.49/198.05
  6. Step 6: Final answer
    x = 213.28

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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.