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Finding the Fourth Proportional to 1,288.76, 1,933.95 and 519.26

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Solution

The fourth proportional to 1,288.76, 1,933.95 and 519.26 is: 779.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.76 : 1,933.95 = 519.26 : x
  2. Step 2: Convert to fraction form
    1,288.76/1,933.95 = 519.26/x
  3. Step 3: Cross multiply
    1,288.76x = 1,933.95 × 519.26
  4. Step 4: Simplify right side
    1,288.76x = 1,004,222.88
  5. Step 5: Solve for x
    x = 1,004,222.88/1,288.76
  6. Step 6: Final answer
    x = 779.22

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