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Finding the Fourth Proportional to 278.82, 384.56 and 173.86

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Solution

The fourth proportional to 278.82, 384.56 and 173.86 is: 239.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.82 : 384.56 = 173.86 : x
  2. Step 2: Convert to fraction form
    278.82/384.56 = 173.86/x
  3. Step 3: Cross multiply
    278.82x = 384.56 × 173.86
  4. Step 4: Simplify right side
    278.82x = 66,859.60
  5. Step 5: Solve for x
    x = 66,859.60/278.82
  6. Step 6: Final answer
    x = 239.79

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