Home / 812,115.61-1,120,705.97-449,531.69

Finding the Fourth Proportional to 812,115.61, 1,120,705.97 and 449,531.69

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Solution

The fourth proportional to 812,115.61, 1,120,705.97 and 449,531.69 is: 620,346.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,115.61 : 1,120,705.97 = 449,531.69 : x
  2. Step 2: Convert to fraction form
    812,115.61/1,120,705.97 = 449,531.69/x
  3. Step 3: Cross multiply
    812,115.61x = 1,120,705.97 × 449,531.69
  4. Step 4: Simplify right side
    812,115.61x = 503,792,840,836.00
  5. Step 5: Solve for x
    x = 503,792,840,836.00/812,115.61
  6. Step 6: Final answer
    x = 620,346.21

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1.5x scale

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.