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Finding the Fourth Proportional to 380.12, 569.99 and 136.55

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Solution

The fourth proportional to 380.12, 569.99 and 136.55 is: 204.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.12 : 569.99 = 136.55 : x
  2. Step 2: Convert to fraction form
    380.12/569.99 = 136.55/x
  3. Step 3: Cross multiply
    380.12x = 569.99 × 136.55
  4. Step 4: Simplify right side
    380.12x = 77,833.90
  5. Step 5: Solve for x
    x = 77,833.90/380.12
  6. Step 6: Final answer
    x = 204.76

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