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Finding the Fourth Proportional to 381.36, 571.68 and 289.92

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Solution

The fourth proportional to 381.36, 571.68 and 289.92 is: 434.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.36 : 571.68 = 289.92 : x
  2. Step 2: Convert to fraction form
    381.36/571.68 = 289.92/x
  3. Step 3: Cross multiply
    381.36x = 571.68 × 289.92
  4. Step 4: Simplify right side
    381.36x = 165,741.47
  5. Step 5: Solve for x
    x = 165,741.47/381.36
  6. Step 6: Final answer
    x = 434.61

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