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Finding the Fourth Proportional to 389.33, 584.42 and 286.28

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Solution

The fourth proportional to 389.33, 584.42 and 286.28 is: 429.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.33 : 584.42 = 286.28 : x
  2. Step 2: Convert to fraction form
    389.33/584.42 = 286.28/x
  3. Step 3: Cross multiply
    389.33x = 584.42 × 286.28
  4. Step 4: Simplify right side
    389.33x = 167,308.88
  5. Step 5: Solve for x
    x = 167,308.88/389.33
  6. Step 6: Final answer
    x = 429.73

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