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Finding the Fourth Proportional to 398.43, 549.84 and 223.77

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Solution

The fourth proportional to 398.43, 549.84 and 223.77 is: 308.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.43 : 549.84 = 223.77 : x
  2. Step 2: Convert to fraction form
    398.43/549.84 = 223.77/x
  3. Step 3: Cross multiply
    398.43x = 549.84 × 223.77
  4. Step 4: Simplify right side
    398.43x = 123,037.70
  5. Step 5: Solve for x
    x = 123,037.70/398.43
  6. Step 6: Final answer
    x = 308.81

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