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Finding the Fourth Proportional to 574.22, 861.46 and 209

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Solution

The fourth proportional to 574.22, 861.46 and 209 is: 313.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.22 : 861.46 = 209 : x
  2. Step 2: Convert to fraction form
    574.22/861.46 = 209/x
  3. Step 3: Cross multiply
    574.22x = 861.46 × 209
  4. Step 4: Simplify right side
    574.22x = 180,045.14
  5. Step 5: Solve for x
    x = 180,045.14/574.22
  6. Step 6: Final answer
    x = 313.55

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