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Finding the Fourth Proportional to 312.73, 468.92 and 129.92

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Solution

The fourth proportional to 312.73, 468.92 and 129.92 is: 194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.73 : 468.92 = 129.92 : x
  2. Step 2: Convert to fraction form
    312.73/468.92 = 129.92/x
  3. Step 3: Cross multiply
    312.73x = 468.92 × 129.92
  4. Step 4: Simplify right side
    312.73x = 60,920.07
  5. Step 5: Solve for x
    x = 60,920.07/312.73
  6. Step 6: Final answer
    x = 194.80

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