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Finding the Fourth Proportional to 198.92, 298.29 and 77.09

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Solution

The fourth proportional to 198.92, 298.29 and 77.09 is: 115.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.92 : 298.29 = 77.09 : x
  2. Step 2: Convert to fraction form
    198.92/298.29 = 77.09/x
  3. Step 3: Cross multiply
    198.92x = 298.29 × 77.09
  4. Step 4: Simplify right side
    198.92x = 22,995.18
  5. Step 5: Solve for x
    x = 22,995.18/198.92
  6. Step 6: Final answer
    x = 115.60

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