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Finding the Fourth Proportional to 439.13, 605.90 and 261.99

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Solution

The fourth proportional to 439.13, 605.90 and 261.99 is: 361.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.13 : 605.90 = 261.99 : x
  2. Step 2: Convert to fraction form
    439.13/605.90 = 261.99/x
  3. Step 3: Cross multiply
    439.13x = 605.90 × 261.99
  4. Step 4: Simplify right side
    439.13x = 158,740.40
  5. Step 5: Solve for x
    x = 158,740.40/439.13
  6. Step 6: Final answer
    x = 361.49

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