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Finding the Fourth Proportional to 250.18, 374.56 and 198.90

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Solution

The fourth proportional to 250.18, 374.56 and 198.90 is: 297.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.18 : 374.56 = 198.90 : x
  2. Step 2: Convert to fraction form
    250.18/374.56 = 198.90/x
  3. Step 3: Cross multiply
    250.18x = 374.56 × 198.90
  4. Step 4: Simplify right side
    250.18x = 74,499.98
  5. Step 5: Solve for x
    x = 74,499.98/250.18
  6. Step 6: Final answer
    x = 297.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.