Home / 640,958,220.86-961,419,395.05-204,285,108.58

Finding the Fourth Proportional to 640,958,220.86, 961,419,395.05 and 204,285,108.58

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Solution

The fourth proportional to 640,958,220.86, 961,419,395.05 and 204,285,108.58 is: 306,421,946.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,958,220.86 : 961,419,395.05 = 204,285,108.58 : x
  2. Step 2: Convert to fraction form
    640,958,220.86/961,419,395.05 = 204,285,108.58/x
  3. Step 3: Cross multiply
    640,958,220.86x = 961,419,395.05 × 204,285,108.58
  4. Step 4: Simplify right side
    640,958,220.86x = 196,403,665,505,792,896
  5. Step 5: Solve for x
    x = 196,403,665,505,792,896/640,958,220.86
  6. Step 6: Final answer
    x = 306,421,946.26

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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.