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Finding the Fourth Proportional to 587.13, 879.43 and 381.09

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Solution

The fourth proportional to 587.13, 879.43 and 381.09 is: 570.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.13 : 879.43 = 381.09 : x
  2. Step 2: Convert to fraction form
    587.13/879.43 = 381.09/x
  3. Step 3: Cross multiply
    587.13x = 879.43 × 381.09
  4. Step 4: Simplify right side
    587.13x = 335,141.98
  5. Step 5: Solve for x
    x = 335,141.98/587.13
  6. Step 6: Final answer
    x = 570.81

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