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Finding the Fourth Proportional to 1,964,392.85, 2,947,942.19 and 685,010.00

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Solution

The fourth proportional to 1,964,392.85, 2,947,942.19 and 685,010.00 is: 1,027,986.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964,392.85 : 2,947,942.19 = 685,010.00 : x
  2. Step 2: Convert to fraction form
    1,964,392.85/2,947,942.19 = 685,010.00/x
  3. Step 3: Cross multiply
    1,964,392.85x = 2,947,942.19 × 685,010.00
  4. Step 4: Simplify right side
    1,964,392.85x = 2,019,369,888,654.28
  5. Step 5: Solve for x
    x = 2,019,369,888,654.28/1,964,392.85
  6. Step 6: Final answer
    x = 1,027,986.78

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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.