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Finding the Fourth Proportional to 485.54, 728.61 and 196.97

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Solution

The fourth proportional to 485.54, 728.61 and 196.97 is: 295.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.54 : 728.61 = 196.97 : x
  2. Step 2: Convert to fraction form
    485.54/728.61 = 196.97/x
  3. Step 3: Cross multiply
    485.54x = 728.61 × 196.97
  4. Step 4: Simplify right side
    485.54x = 143,515.39
  5. Step 5: Solve for x
    x = 143,515.39/485.54
  6. Step 6: Final answer
    x = 295.58

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