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Finding the Fourth Proportional to 681,219.56, 939,994.26 and 394,678.28

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Solution

The fourth proportional to 681,219.56, 939,994.26 and 394,678.28 is: 544,604.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,219.56 : 939,994.26 = 394,678.28 : x
  2. Step 2: Convert to fraction form
    681,219.56/939,994.26 = 394,678.28/x
  3. Step 3: Cross multiply
    681,219.56x = 939,994.26 × 394,678.28
  4. Step 4: Simplify right side
    681,219.56x = 370,995,317,746.67
  5. Step 5: Solve for x
    x = 370,995,317,746.67/681,219.56
  6. Step 6: Final answer
    x = 544,604.62

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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.