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Finding the Fourth Proportional to 268.80, 403.61 and 214.53

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Solution

The fourth proportional to 268.80, 403.61 and 214.53 is: 322.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.80 : 403.61 = 214.53 : x
  2. Step 2: Convert to fraction form
    268.80/403.61 = 214.53/x
  3. Step 3: Cross multiply
    268.80x = 403.61 × 214.53
  4. Step 4: Simplify right side
    268.80x = 86,585.38
  5. Step 5: Solve for x
    x = 86,585.38/268.80
  6. Step 6: Final answer
    x = 322.12

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