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Finding the Fourth Proportional to 701,665,195.38, 968,297,988.91 and 388,399,409.39

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Solution

The fourth proportional to 701,665,195.38, 968,297,988.91 and 388,399,409.39 is: 535,991,195.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    701,665,195.38 : 968,297,988.91 = 388,399,409.39 : x
  2. Step 2: Convert to fraction form
    701,665,195.38/968,297,988.91 = 388,399,409.39/x
  3. Step 3: Cross multiply
    701,665,195.38x = 968,297,988.91 × 388,399,409.39
  4. Step 4: Simplify right side
    701,665,195.38x = 376,086,367,002,906,816
  5. Step 5: Solve for x
    x = 376,086,367,002,906,816/701,665,195.38
  6. Step 6: Final answer
    x = 535,991,195.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.