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Finding the Fourth Proportional to 198.44, 297.56 and 61.45

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Solution

The fourth proportional to 198.44, 297.56 and 61.45 is: 92.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.44 : 297.56 = 61.45 : x
  2. Step 2: Convert to fraction form
    198.44/297.56 = 61.45/x
  3. Step 3: Cross multiply
    198.44x = 297.56 × 61.45
  4. Step 4: Simplify right side
    198.44x = 18,285.06
  5. Step 5: Solve for x
    x = 18,285.06/198.44
  6. Step 6: Final answer
    x = 92.14

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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.