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Finding the Fourth Proportional to 640,910,978.40, 961,355,961.90 and 204,205,730.16

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Solution

The fourth proportional to 640,910,978.40, 961,355,961.90 and 204,205,730.16 is: 306,305,247.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,910,978.40 : 961,355,961.90 = 204,205,730.16 : x
  2. Step 2: Convert to fraction form
    640,910,978.40/961,355,961.90 = 204,205,730.16/x
  3. Step 3: Cross multiply
    640,910,978.40x = 961,355,961.90 × 204,205,730.16
  4. Step 4: Simplify right side
    640,910,978.40x = 196,314,396,143,458,624
  5. Step 5: Solve for x
    x = 196,314,396,143,458,624/640,910,978.40
  6. Step 6: Final answer
    x = 306,305,247.94

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