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Finding the Fourth Proportional to 1,268.18, 1,902.28 and 343.74

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Solution

The fourth proportional to 1,268.18, 1,902.28 and 343.74 is: 515.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.18 : 1,902.28 = 343.74 : x
  2. Step 2: Convert to fraction form
    1,268.18/1,902.28 = 343.74/x
  3. Step 3: Cross multiply
    1,268.18x = 1,902.28 × 343.74
  4. Step 4: Simplify right side
    1,268.18x = 653,895.68
  5. Step 5: Solve for x
    x = 653,895.68/1,268.18
  6. Step 6: Final answer
    x = 515.62

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