Home / 720,809,100,658.78-994,717,543,943.20-391,212,143,906.26

Finding the Fourth Proportional to 720,809,100,658.78, 994,717,543,943.20 and 391,212,143,906.26

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Solution

The fourth proportional to 720,809,100,658.78, 994,717,543,943.20 and 391,212,143,906.26 is: 539,873,293,208.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,809,100,658.78 : 994,717,543,943.20 = 391,212,143,906.26 : x
  2. Step 2: Convert to fraction form
    720,809,100,658.78/994,717,543,943.20 = 391,212,143,906.26/x
  3. Step 3: Cross multiply
    720,809,100,658.78x = 994,717,543,943.20 × 391,212,143,906.26
  4. Step 4: Simplify right side
    720,809,100,658.78x = 389,145,582,947,188,665,745,408
  5. Step 5: Solve for x
    x = 389,145,582,947,188,665,745,408/720,809,100,658.78
  6. Step 6: Final answer
    x = 539,873,293,208.33

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Double scale
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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.