Home / 919,682,067.75-1,379,510,110.38-428,120,400.39

Finding the Fourth Proportional to 919,682,067.75, 1,379,510,110.38 and 428,120,400.39

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Solution

The fourth proportional to 919,682,067.75, 1,379,510,110.38 and 428,120,400.39 is: 642,174,553.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,682,067.75 : 1,379,510,110.38 = 428,120,400.39 : x
  2. Step 2: Convert to fraction form
    919,682,067.75/1,379,510,110.38 = 428,120,400.39/x
  3. Step 3: Cross multiply
    919,682,067.75x = 1,379,510,110.38 × 428,120,400.39
  4. Step 4: Simplify right side
    919,682,067.75x = 590,596,420,797,938,688
  5. Step 5: Solve for x
    x = 590,596,420,797,938,688/919,682,067.75
  6. Step 6: Final answer
    x = 642,174,553.04

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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.