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Finding the Fourth Proportional to 406.06, 559.78 and 287.94

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Solution

The fourth proportional to 406.06, 559.78 and 287.94 is: 396.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.06 : 559.78 = 287.94 : x
  2. Step 2: Convert to fraction form
    406.06/559.78 = 287.94/x
  3. Step 3: Cross multiply
    406.06x = 559.78 × 287.94
  4. Step 4: Simplify right side
    406.06x = 161,183.05
  5. Step 5: Solve for x
    x = 161,183.05/406.06
  6. Step 6: Final answer
    x = 396.94

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