Home / 1,279,394,999.95-1,765,837,874.24-878,057,755.15

Finding the Fourth Proportional to 1,279,394,999.95, 1,765,837,874.24 and 878,057,755.15

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Solution

The fourth proportional to 1,279,394,999.95, 1,765,837,874.24 and 878,057,755.15 is: 1,211,906,909.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,394,999.95 : 1,765,837,874.24 = 878,057,755.15 : x
  2. Step 2: Convert to fraction form
    1,279,394,999.95/1,765,837,874.24 = 878,057,755.15/x
  3. Step 3: Cross multiply
    1,279,394,999.95x = 1,765,837,874.24 × 878,057,755.15
  4. Step 4: Simplify right side
    1,279,394,999.95x = 1,550,507,639,814,022,400
  5. Step 5: Solve for x
    x = 1,550,507,639,814,022,400/1,279,394,999.95
  6. Step 6: Final answer
    x = 1,211,906,909.03

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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.