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Finding the Fourth Proportional to 6,628,991.46, 9,943,907.47 and 2,080,219.79

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Solution

The fourth proportional to 6,628,991.46, 9,943,907.47 and 2,080,219.79 is: 3,120,461.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628,991.46 : 9,943,907.47 = 2,080,219.79 : x
  2. Step 2: Convert to fraction form
    6,628,991.46/9,943,907.47 = 2,080,219.79/x
  3. Step 3: Cross multiply
    6,628,991.46x = 9,943,907.47 × 2,080,219.79
  4. Step 4: Simplify right side
    6,628,991.46x = 20,685,513,109,022.83
  5. Step 5: Solve for x
    x = 20,685,513,109,022.83/6,628,991.46
  6. Step 6: Final answer
    x = 3,120,461.57

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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.