Home / 1,279,394,998.95-1,765,837,872.86-878,057,754.15

Finding the Fourth Proportional to 1,279,394,998.95, 1,765,837,872.86 and 878,057,754.15

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Solution

The fourth proportional to 1,279,394,998.95, 1,765,837,872.86 and 878,057,754.15 is: 1,211,906,907.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,394,998.95 : 1,765,837,872.86 = 878,057,754.15 : x
  2. Step 2: Convert to fraction form
    1,279,394,998.95/1,765,837,872.86 = 878,057,754.15/x
  3. Step 3: Cross multiply
    1,279,394,998.95x = 1,765,837,872.86 × 878,057,754.15
  4. Step 4: Simplify right side
    1,279,394,998.95x = 1,550,507,636,832,074,496
  5. Step 5: Solve for x
    x = 1,550,507,636,832,074,496/1,279,394,998.95
  6. Step 6: Final answer
    x = 1,211,906,907.64

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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.