Home / 419,904,906.80-629,857,360.20-389,293,905.20

Finding the Fourth Proportional to 419,904,906.80, 629,857,360.20 and 389,293,905.20

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Solution

The fourth proportional to 419,904,906.80, 629,857,360.20 and 389,293,905.20 is: 583,940,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,906.80 : 629,857,360.20 = 389,293,905.20 : x
  2. Step 2: Convert to fraction form
    419,904,906.80/629,857,360.20 = 389,293,905.20/x
  3. Step 3: Cross multiply
    419,904,906.80x = 629,857,360.20 × 389,293,905.20
  4. Step 4: Simplify right side
    419,904,906.80x = 245,199,631,471,221,056
  5. Step 5: Solve for x
    x = 245,199,631,471,221,056/419,904,906.80
  6. Step 6: Final answer
    x = 583,940,857.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.