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Finding the Fourth Proportional to 198.46, 273.50 and 143.10

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Solution

The fourth proportional to 198.46, 273.50 and 143.10 is: 197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.46 : 273.50 = 143.10 : x
  2. Step 2: Convert to fraction form
    198.46/273.50 = 143.10/x
  3. Step 3: Cross multiply
    198.46x = 273.50 × 143.10
  4. Step 4: Simplify right side
    198.46x = 39,137.85
  5. Step 5: Solve for x
    x = 39,137.85/198.46
  6. Step 6: Final answer
    x = 197.21

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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.