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Finding the Fourth Proportional to 3,481.60, 5,211.60 and 2,747.20

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Solution

The fourth proportional to 3,481.60, 5,211.60 and 2,747.20 is: 4,112.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,481.60 : 5,211.60 = 2,747.20 : x
  2. Step 2: Convert to fraction form
    3,481.60/5,211.60 = 2,747.20/x
  3. Step 3: Cross multiply
    3,481.60x = 5,211.60 × 2,747.20
  4. Step 4: Simplify right side
    3,481.60x = 14,317,307.52
  5. Step 5: Solve for x
    x = 14,317,307.52/3,481.60
  6. Step 6: Final answer
    x = 4,112.28

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