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Finding the Fourth Proportional to 408.12, 612.23 and 161.43

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Solution

The fourth proportional to 408.12, 612.23 and 161.43 is: 242.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.12 : 612.23 = 161.43 : x
  2. Step 2: Convert to fraction form
    408.12/612.23 = 161.43/x
  3. Step 3: Cross multiply
    408.12x = 612.23 × 161.43
  4. Step 4: Simplify right side
    408.12x = 98,832.29
  5. Step 5: Solve for x
    x = 98,832.29/408.12
  6. Step 6: Final answer
    x = 242.16

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