Home / 1,389,708.36-1,917,636.39-777,895.38

Finding the Fourth Proportional to 1,389,708.36, 1,917,636.39 and 777,895.38

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Solution

The fourth proportional to 1,389,708.36, 1,917,636.39 and 777,895.38 is: 1,073,405.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,708.36 : 1,917,636.39 = 777,895.38 : x
  2. Step 2: Convert to fraction form
    1,389,708.36/1,917,636.39 = 777,895.38/x
  3. Step 3: Cross multiply
    1,389,708.36x = 1,917,636.39 × 777,895.38
  4. Step 4: Simplify right side
    1,389,708.36x = 1,491,720,488,300.88
  5. Step 5: Solve for x
    x = 1,491,720,488,300.88/1,389,708.36
  6. Step 6: Final answer
    x = 1,073,405.42

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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.