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Finding the Fourth Proportional to 354.56, 489 and 223.52

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Solution

The fourth proportional to 354.56, 489 and 223.52 is: 308.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.56 : 489 = 223.52 : x
  2. Step 2: Convert to fraction form
    354.56/489 = 223.52/x
  3. Step 3: Cross multiply
    354.56x = 489 × 223.52
  4. Step 4: Simplify right side
    354.56x = 109,301.28
  5. Step 5: Solve for x
    x = 109,301.28/354.56
  6. Step 6: Final answer
    x = 308.27

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