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Finding the Fourth Proportional to 571.96, 857.89 and 187.21

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Solution

The fourth proportional to 571.96, 857.89 and 187.21 is: 280.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.96 : 857.89 = 187.21 : x
  2. Step 2: Convert to fraction form
    571.96/857.89 = 187.21/x
  3. Step 3: Cross multiply
    571.96x = 857.89 × 187.21
  4. Step 4: Simplify right side
    571.96x = 160,605.59
  5. Step 5: Solve for x
    x = 160,605.59/571.96
  6. Step 6: Final answer
    x = 280.80

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