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Finding the Fourth Proportional to 681,019.66, 939,664.56 and 394,522.66

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Solution

The fourth proportional to 681,019.66, 939,664.56 and 394,522.66 is: 544,358.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,019.66 : 939,664.56 = 394,522.66 : x
  2. Step 2: Convert to fraction form
    681,019.66/939,664.56 = 394,522.66/x
  3. Step 3: Cross multiply
    681,019.66x = 939,664.56 × 394,522.66
  4. Step 4: Simplify right side
    681,019.66x = 370,718,961,718.93
  5. Step 5: Solve for x
    x = 370,718,961,718.93/681,019.66
  6. Step 6: Final answer
    x = 544,358.68

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Double scale
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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.