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Finding the Fourth Proportional to 653,505,312.80, 978,914,276.40 and 449,264,007.20

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Solution

The fourth proportional to 653,505,312.80, 978,914,276.40 and 449,264,007.20 is: 672,972,264.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,505,312.80 : 978,914,276.40 = 449,264,007.20 : x
  2. Step 2: Convert to fraction form
    653,505,312.80/978,914,276.40 = 449,264,007.20/x
  3. Step 3: Cross multiply
    653,505,312.80x = 978,914,276.40 × 449,264,007.20
  4. Step 4: Simplify right side
    653,505,312.80x = 439,790,950,520,752,384
  5. Step 5: Solve for x
    x = 439,790,950,520,752,384/653,505,312.80
  6. Step 6: Final answer
    x = 672,972,264.96

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