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Finding the Fourth Proportional to 279.86, 418.92 and 187.36

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Solution

The fourth proportional to 279.86, 418.92 and 187.36 is: 280.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.86 : 418.92 = 187.36 : x
  2. Step 2: Convert to fraction form
    279.86/418.92 = 187.36/x
  3. Step 3: Cross multiply
    279.86x = 418.92 × 187.36
  4. Step 4: Simplify right side
    279.86x = 78,488.85
  5. Step 5: Solve for x
    x = 78,488.85/279.86
  6. Step 6: Final answer
    x = 280.46

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