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Finding the Fourth Proportional to 327.78, 451.89 and 278.55

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Solution

The fourth proportional to 327.78, 451.89 and 278.55 is: 384.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.78 : 451.89 = 278.55 : x
  2. Step 2: Convert to fraction form
    327.78/451.89 = 278.55/x
  3. Step 3: Cross multiply
    327.78x = 451.89 × 278.55
  4. Step 4: Simplify right side
    327.78x = 125,873.96
  5. Step 5: Solve for x
    x = 125,873.96/327.78
  6. Step 6: Final answer
    x = 384.02

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