Home / 812,155.72-1,120,761.32-449,571.90

Finding the Fourth Proportional to 812,155.72, 1,120,761.32 and 449,571.90

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Solution

The fourth proportional to 812,155.72, 1,120,761.32 and 449,571.90 is: 620,401.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,155.72 : 1,120,761.32 = 449,571.90 : x
  2. Step 2: Convert to fraction form
    812,155.72/1,120,761.32 = 449,571.90/x
  3. Step 3: Cross multiply
    812,155.72x = 1,120,761.32 × 449,571.90
  4. Step 4: Simplify right side
    812,155.72x = 503,862,796,078.91
  5. Step 5: Solve for x
    x = 503,862,796,078.91/812,155.72
  6. Step 6: Final answer
    x = 620,401.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.