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Finding the Fourth Proportional to 331.03, 457.01 and 220.69

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Solution

The fourth proportional to 331.03, 457.01 and 220.69 is: 304.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.03 : 457.01 = 220.69 : x
  2. Step 2: Convert to fraction form
    331.03/457.01 = 220.69/x
  3. Step 3: Cross multiply
    331.03x = 457.01 × 220.69
  4. Step 4: Simplify right side
    331.03x = 100,857.54
  5. Step 5: Solve for x
    x = 100,857.54/331.03
  6. Step 6: Final answer
    x = 304.68

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