Home / 681,100.50-939,918.45-394,786.58

Finding the Fourth Proportional to 681,100.50, 939,918.45 and 394,786.58

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Solution

The fourth proportional to 681,100.50, 939,918.45 and 394,786.58 is: 544,805.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,100.50 : 939,918.45 = 394,786.58 : x
  2. Step 2: Convert to fraction form
    681,100.50/939,918.45 = 394,786.58/x
  3. Step 3: Cross multiply
    681,100.50x = 939,918.45 × 394,786.58
  4. Step 4: Simplify right side
    681,100.50x = 371,067,190,354.40
  5. Step 5: Solve for x
    x = 371,067,190,354.40/681,100.50
  6. Step 6: Final answer
    x = 544,805.34

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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.