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Finding the Fourth Proportional to 275.92, 413.99 and 129.76

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Solution

The fourth proportional to 275.92, 413.99 and 129.76 is: 194.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.92 : 413.99 = 129.76 : x
  2. Step 2: Convert to fraction form
    275.92/413.99 = 129.76/x
  3. Step 3: Cross multiply
    275.92x = 413.99 × 129.76
  4. Step 4: Simplify right side
    275.92x = 53,719.34
  5. Step 5: Solve for x
    x = 53,719.34/275.92
  6. Step 6: Final answer
    x = 194.69

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