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Finding the Fourth Proportional to 2,579,709.85, 3,869,652.25 and 686,453.11

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Solution

The fourth proportional to 2,579,709.85, 3,869,652.25 and 686,453.11 is: 1,029,702.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579,709.85 : 3,869,652.25 = 686,453.11 : x
  2. Step 2: Convert to fraction form
    2,579,709.85/3,869,652.25 = 686,453.11/x
  3. Step 3: Cross multiply
    2,579,709.85x = 3,869,652.25 × 686,453.11
  4. Step 4: Simplify right side
    2,579,709.85x = 2,656,334,821,631.00
  5. Step 5: Solve for x
    x = 2,656,334,821,631.00/2,579,709.85
  6. Step 6: Final answer
    x = 1,029,702.94

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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.