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Finding the Fourth Proportional to 640,560.16, 961,107.12 and 280,989.28

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Solution

The fourth proportional to 640,560.16, 961,107.12 and 280,989.28 is: 421,600.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,560.16 : 961,107.12 = 280,989.28 : x
  2. Step 2: Convert to fraction form
    640,560.16/961,107.12 = 280,989.28/x
  3. Step 3: Cross multiply
    640,560.16x = 961,107.12 × 280,989.28
  4. Step 4: Simplify right side
    640,560.16x = 270,060,797,651.67
  5. Step 5: Solve for x
    x = 270,060,797,651.67/640,560.16
  6. Step 6: Final answer
    x = 421,600.99

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