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Finding the Fourth Proportional to 258.98, 388.95 and 226.58

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Solution

The fourth proportional to 258.98, 388.95 and 226.58 is: 340.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.98 : 388.95 = 226.58 : x
  2. Step 2: Convert to fraction form
    258.98/388.95 = 226.58/x
  3. Step 3: Cross multiply
    258.98x = 388.95 × 226.58
  4. Step 4: Simplify right side
    258.98x = 88,128.29
  5. Step 5: Solve for x
    x = 88,128.29/258.98
  6. Step 6: Final answer
    x = 340.29

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