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Finding the Fourth Proportional to 705,794,236.09, 973,990,670.67 and 388,247,661.70

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Solution

The fourth proportional to 705,794,236.09, 973,990,670.67 and 388,247,661.70 is: 535,778,816.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,794,236.09 : 973,990,670.67 = 388,247,661.70 : x
  2. Step 2: Convert to fraction form
    705,794,236.09/973,990,670.67 = 388,247,661.70/x
  3. Step 3: Cross multiply
    705,794,236.09x = 973,990,670.67 × 388,247,661.70
  4. Step 4: Simplify right side
    705,794,236.09x = 378,149,600,405,242,240
  5. Step 5: Solve for x
    x = 378,149,600,405,242,240/705,794,236.09
  6. Step 6: Final answer
    x = 535,778,816.36

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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.