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Finding the Fourth Proportional to 198.37, 273.57 and 154.12

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Solution

The fourth proportional to 198.37, 273.57 and 154.12 is: 212.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.37 : 273.57 = 154.12 : x
  2. Step 2: Convert to fraction form
    198.37/273.57 = 154.12/x
  3. Step 3: Cross multiply
    198.37x = 273.57 × 154.12
  4. Step 4: Simplify right side
    198.37x = 42,162.61
  5. Step 5: Solve for x
    x = 42,162.61/198.37
  6. Step 6: Final answer
    x = 212.55

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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.