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Finding the Fourth Proportional to 489.80, 734.85 and 165.17

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Solution

The fourth proportional to 489.80, 734.85 and 165.17 is: 247.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.80 : 734.85 = 165.17 : x
  2. Step 2: Convert to fraction form
    489.80/734.85 = 165.17/x
  3. Step 3: Cross multiply
    489.80x = 734.85 × 165.17
  4. Step 4: Simplify right side
    489.80x = 121,375.17
  5. Step 5: Solve for x
    x = 121,375.17/489.80
  6. Step 6: Final answer
    x = 247.81

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