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Finding the Fourth Proportional to 398.49, 549.97 and 223.87

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Solution

The fourth proportional to 398.49, 549.97 and 223.87 is: 308.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.49 : 549.97 = 223.87 : x
  2. Step 2: Convert to fraction form
    398.49/549.97 = 223.87/x
  3. Step 3: Cross multiply
    398.49x = 549.97 × 223.87
  4. Step 4: Simplify right side
    398.49x = 123,119.85
  5. Step 5: Solve for x
    x = 123,119.85/398.49
  6. Step 6: Final answer
    x = 308.97

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