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Finding the Fourth Proportional to 2,764,886, 4,147,329 and 663,638

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Solution

The fourth proportional to 2,764,886, 4,147,329 and 663,638 is: 995,457

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,764,886 : 4,147,329 = 663,638 : x
  2. Step 2: Convert to fraction form
    2,764,886/4,147,329 = 663,638/x
  3. Step 3: Cross multiply
    2,764,886x = 4,147,329 × 663,638
  4. Step 4: Simplify right side
    2,764,886x = 2,752,325,122,902
  5. Step 5: Solve for x
    x = 2,752,325,122,902/2,764,886
  6. Step 6: Final answer
    x = 995,457

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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.