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Finding the Fourth Proportional to 393.07, 589.60 and 136.57

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Solution

The fourth proportional to 393.07, 589.60 and 136.57 is: 204.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.07 : 589.60 = 136.57 : x
  2. Step 2: Convert to fraction form
    393.07/589.60 = 136.57/x
  3. Step 3: Cross multiply
    393.07x = 589.60 × 136.57
  4. Step 4: Simplify right side
    393.07x = 80,518.04
  5. Step 5: Solve for x
    x = 80,518.04/393.07
  6. Step 6: Final answer
    x = 204.85

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