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Finding the Fourth Proportional to 206, 308.79 and 84.33

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Solution

The fourth proportional to 206, 308.79 and 84.33 is: 126.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    206 : 308.79 = 84.33 : x
  2. Step 2: Convert to fraction form
    206/308.79 = 84.33/x
  3. Step 3: Cross multiply
    206x = 308.79 × 84.33
  4. Step 4: Simplify right side
    206x = 26,040.26
  5. Step 5: Solve for x
    x = 26,040.26/206
  6. Step 6: Final answer
    x = 126.41

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