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Finding the Fourth Proportional to 2,579,609.80, 3,869,414.70 and 686,542.60

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Solution

The fourth proportional to 2,579,609.80, 3,869,414.70 and 686,542.60 is: 1,029,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579,609.80 : 3,869,414.70 = 686,542.60 : x
  2. Step 2: Convert to fraction form
    2,579,609.80/3,869,414.70 = 686,542.60/x
  3. Step 3: Cross multiply
    2,579,609.80x = 3,869,414.70 × 686,542.60
  4. Step 4: Simplify right side
    2,579,609.80x = 2,656,518,028,616.22
  5. Step 5: Solve for x
    x = 2,656,518,028,616.22/2,579,609.80
  6. Step 6: Final answer
    x = 1,029,813.90

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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.