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Finding the Fourth Proportional to 680,698.92, 939,308.22 and 394,237.56

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Solution

The fourth proportional to 680,698.92, 939,308.22 and 394,237.56 is: 544,015.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,698.92 : 939,308.22 = 394,237.56 : x
  2. Step 2: Convert to fraction form
    680,698.92/939,308.22 = 394,237.56/x
  3. Step 3: Cross multiply
    680,698.92x = 939,308.22 × 394,237.56
  4. Step 4: Simplify right side
    680,698.92x = 370,310,580,740.74
  5. Step 5: Solve for x
    x = 370,310,580,740.74/680,698.92
  6. Step 6: Final answer
    x = 544,015.23

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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.