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Finding the Fourth Proportional to 2,618,872.43, 3,928,474.69 and 821,826.81

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Solution

The fourth proportional to 2,618,872.43, 3,928,474.69 and 821,826.81 is: 1,232,792.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618,872.43 : 3,928,474.69 = 821,826.81 : x
  2. Step 2: Convert to fraction form
    2,618,872.43/3,928,474.69 = 821,826.81/x
  3. Step 3: Cross multiply
    2,618,872.43x = 3,928,474.69 × 821,826.81
  4. Step 4: Simplify right side
    2,618,872.43x = 3,228,525,820,593.87
  5. Step 5: Solve for x
    x = 3,228,525,820,593.87/2,618,872.43
  6. Step 6: Final answer
    x = 1,232,792.32

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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.