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Finding the Fourth Proportional to 2,664.64, 3,998.40 and 1,125.76

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Solution

The fourth proportional to 2,664.64, 3,998.40 and 1,125.76 is: 1,689.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,664.64 : 3,998.40 = 1,125.76 : x
  2. Step 2: Convert to fraction form
    2,664.64/3,998.40 = 1,125.76/x
  3. Step 3: Cross multiply
    2,664.64x = 3,998.40 × 1,125.76
  4. Step 4: Simplify right side
    2,664.64x = 4,501,238.78
  5. Step 5: Solve for x
    x = 4,501,238.78/2,664.64
  6. Step 6: Final answer
    x = 1,689.25

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