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Finding the Fourth Proportional to 198.50, 297.16 and 153.38

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Solution

The fourth proportional to 198.50, 297.16 and 153.38 is: 229.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.50 : 297.16 = 153.38 : x
  2. Step 2: Convert to fraction form
    198.50/297.16 = 153.38/x
  3. Step 3: Cross multiply
    198.50x = 297.16 × 153.38
  4. Step 4: Simplify right side
    198.50x = 45,578.40
  5. Step 5: Solve for x
    x = 45,578.40/198.50
  6. Step 6: Final answer
    x = 229.61

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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.