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Finding the Fourth Proportional to 409.12, 613.31 and 203.75

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Solution

The fourth proportional to 409.12, 613.31 and 203.75 is: 305.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.12 : 613.31 = 203.75 : x
  2. Step 2: Convert to fraction form
    409.12/613.31 = 203.75/x
  3. Step 3: Cross multiply
    409.12x = 613.31 × 203.75
  4. Step 4: Simplify right side
    409.12x = 124,960.13
  5. Step 5: Solve for x
    x = 124,960.13/409.12
  6. Step 6: Final answer
    x = 305.44

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