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Finding the Fourth Proportional to 281.30, 421.79 and 98.69

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Solution

The fourth proportional to 281.30, 421.79 and 98.69 is: 147.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.30 : 421.79 = 98.69 : x
  2. Step 2: Convert to fraction form
    281.30/421.79 = 98.69/x
  3. Step 3: Cross multiply
    281.30x = 421.79 × 98.69
  4. Step 4: Simplify right side
    281.30x = 41,623.85
  5. Step 5: Solve for x
    x = 41,623.85/281.30
  6. Step 6: Final answer
    x = 147.97

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