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Finding the Fourth Proportional to 559.89, 840.02 and 213.21

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Solution

The fourth proportional to 559.89, 840.02 and 213.21 is: 319.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.89 : 840.02 = 213.21 : x
  2. Step 2: Convert to fraction form
    559.89/840.02 = 213.21/x
  3. Step 3: Cross multiply
    559.89x = 840.02 × 213.21
  4. Step 4: Simplify right side
    559.89x = 179,099.60
  5. Step 5: Solve for x
    x = 179,099.60/559.89
  6. Step 6: Final answer
    x = 319.88

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