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Finding the Fourth Proportional to 323.86, 485.78 and 186.48

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Solution

The fourth proportional to 323.86, 485.78 and 186.48 is: 279.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.86 : 485.78 = 186.48 : x
  2. Step 2: Convert to fraction form
    323.86/485.78 = 186.48/x
  3. Step 3: Cross multiply
    323.86x = 485.78 × 186.48
  4. Step 4: Simplify right side
    323.86x = 90,588.25
  5. Step 5: Solve for x
    x = 90,588.25/323.86
  6. Step 6: Final answer
    x = 279.71

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