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Finding the Fourth Proportional to 681,069.56, 939,875.98 and 394,755.72

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Solution

The fourth proportional to 681,069.56, 939,875.98 and 394,755.72 is: 544,762.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,069.56 : 939,875.98 = 394,755.72 : x
  2. Step 2: Convert to fraction form
    681,069.56/939,875.98 = 394,755.72/x
  3. Step 3: Cross multiply
    681,069.56x = 939,875.98 × 394,755.72
  4. Step 4: Simplify right side
    681,069.56x = 371,021,419,195.61
  5. Step 5: Solve for x
    x = 371,021,419,195.61/681,069.56
  6. Step 6: Final answer
    x = 544,762.89

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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.