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Finding the Fourth Proportional to 393.13, 589.69 and 136.63

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Solution

The fourth proportional to 393.13, 589.69 and 136.63 is: 204.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.13 : 589.69 = 136.63 : x
  2. Step 2: Convert to fraction form
    393.13/589.69 = 136.63/x
  3. Step 3: Cross multiply
    393.13x = 589.69 × 136.63
  4. Step 4: Simplify right side
    393.13x = 80,566.40
  5. Step 5: Solve for x
    x = 80,566.40/393.13
  6. Step 6: Final answer
    x = 204.94

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