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Finding the Fourth Proportional to 680,697.92, 939,306.84 and 394,236.56

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Solution

The fourth proportional to 680,697.92, 939,306.84 and 394,236.56 is: 544,013.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,697.92 : 939,306.84 = 394,236.56 : x
  2. Step 2: Convert to fraction form
    680,697.92/939,306.84 = 394,236.56/x
  3. Step 3: Cross multiply
    680,697.92x = 939,306.84 × 394,236.56
  4. Step 4: Simplify right side
    680,697.92x = 370,309,097,386.07
  5. Step 5: Solve for x
    x = 370,309,097,386.07/680,697.92
  6. Step 6: Final answer
    x = 544,013.85

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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.