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Finding the Fourth Proportional to 422.97, 583.81 and 257.28

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Solution

The fourth proportional to 422.97, 583.81 and 257.28 is: 355.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.97 : 583.81 = 257.28 : x
  2. Step 2: Convert to fraction form
    422.97/583.81 = 257.28/x
  3. Step 3: Cross multiply
    422.97x = 583.81 × 257.28
  4. Step 4: Simplify right side
    422.97x = 150,199.80
  5. Step 5: Solve for x
    x = 150,199.80/422.97
  6. Step 6: Final answer
    x = 355.11

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