Home / 812,205.15-1,120,491.18-489,736.10

Finding the Fourth Proportional to 812,205.15, 1,120,491.18 and 489,736.10

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Solution

The fourth proportional to 812,205.15, 1,120,491.18 and 489,736.10 is: 675,623.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,205.15 : 1,120,491.18 = 489,736.10 : x
  2. Step 2: Convert to fraction form
    812,205.15/1,120,491.18 = 489,736.10/x
  3. Step 3: Cross multiply
    812,205.15x = 1,120,491.18 × 489,736.10
  4. Step 4: Simplify right side
    812,205.15x = 548,744,977,801.26
  5. Step 5: Solve for x
    x = 548,744,977,801.26/812,205.15
  6. Step 6: Final answer
    x = 675,623.62

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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.