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Finding the Fourth Proportional to 403.94, 605.21 and 317.82

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Solution

The fourth proportional to 403.94, 605.21 and 317.82 is: 476.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.94 : 605.21 = 317.82 : x
  2. Step 2: Convert to fraction form
    403.94/605.21 = 317.82/x
  3. Step 3: Cross multiply
    403.94x = 605.21 × 317.82
  4. Step 4: Simplify right side
    403.94x = 192,346.25
  5. Step 5: Solve for x
    x = 192,346.25/403.94
  6. Step 6: Final answer
    x = 476.18

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