Home / 1,389,806.39-1,917,843.93-777,856.25

Finding the Fourth Proportional to 1,389,806.39, 1,917,843.93 and 777,856.25

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Solution

The fourth proportional to 1,389,806.39, 1,917,843.93 and 777,856.25 is: 1,073,391.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,806.39 : 1,917,843.93 = 777,856.25 : x
  2. Step 2: Convert to fraction form
    1,389,806.39/1,917,843.93 = 777,856.25/x
  3. Step 3: Cross multiply
    1,389,806.39x = 1,917,843.93 × 777,856.25
  4. Step 4: Simplify right side
    1,389,806.39x = 1,491,806,877,885.84
  5. Step 5: Solve for x
    x = 1,491,806,877,885.84/1,389,806.39
  6. Step 6: Final answer
    x = 1,073,391.87

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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.