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Finding the Fourth Proportional to 198.48, 297.83 and 107.16

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Solution

The fourth proportional to 198.48, 297.83 and 107.16 is: 160.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.48 : 297.83 = 107.16 : x
  2. Step 2: Convert to fraction form
    198.48/297.83 = 107.16/x
  3. Step 3: Cross multiply
    198.48x = 297.83 × 107.16
  4. Step 4: Simplify right side
    198.48x = 31,915.46
  5. Step 5: Solve for x
    x = 31,915.46/198.48
  6. Step 6: Final answer
    x = 160.80

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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.