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Finding the Fourth Proportional to 1,205,435, 1,663,578.06 and 668,891

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Solution

The fourth proportional to 1,205,435, 1,663,578.06 and 668,891 is: 923,112.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205,435 : 1,663,578.06 = 668,891 : x
  2. Step 2: Convert to fraction form
    1,205,435/1,663,578.06 = 668,891/x
  3. Step 3: Cross multiply
    1,205,435x = 1,663,578.06 × 668,891
  4. Step 4: Simplify right side
    1,205,435x = 1,112,752,392,131.46
  5. Step 5: Solve for x
    x = 1,112,752,392,131.46/1,205,435
  6. Step 6: Final answer
    x = 923,112.73

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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.