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Finding the Fourth Proportional to 1,947,951.60, 2,921,927.40 and 685,906.80

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Solution

The fourth proportional to 1,947,951.60, 2,921,927.40 and 685,906.80 is: 1,028,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947,951.60 : 2,921,927.40 = 685,906.80 : x
  2. Step 2: Convert to fraction form
    1,947,951.60/2,921,927.40 = 685,906.80/x
  3. Step 3: Cross multiply
    1,947,951.60x = 2,921,927.40 × 685,906.80
  4. Step 4: Simplify right side
    1,947,951.60x = 2,004,169,872,766.32
  5. Step 5: Solve for x
    x = 2,004,169,872,766.32/1,947,951.60
  6. Step 6: Final answer
    x = 1,028,860.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.