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Finding the Fourth Proportional to 681,118.31, 939,943.51 and 394,804.49

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Solution

The fourth proportional to 681,118.31, 939,943.51 and 394,804.49 is: 544,830.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,118.31 : 939,943.51 = 394,804.49 : x
  2. Step 2: Convert to fraction form
    681,118.31/939,943.51 = 394,804.49/x
  3. Step 3: Cross multiply
    681,118.31x = 939,943.51 × 394,804.49
  4. Step 4: Simplify right side
    681,118.31x = 371,093,912,407.63
  5. Step 5: Solve for x
    x = 371,093,912,407.63/681,118.31
  6. Step 6: Final answer
    x = 544,830.33

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1.5x scale

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.