Home / 812,375.39-1,120,725.09-489,906.29

Finding the Fourth Proportional to 812,375.39, 1,120,725.09 and 489,906.29

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Solution

The fourth proportional to 812,375.39, 1,120,725.09 and 489,906.29 is: 675,857.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,375.39 : 1,120,725.09 = 489,906.29 : x
  2. Step 2: Convert to fraction form
    812,375.39/1,120,725.09 = 489,906.29/x
  3. Step 3: Cross multiply
    812,375.39x = 1,120,725.09 × 489,906.29
  4. Step 4: Simplify right side
    812,375.39x = 549,050,270,951.82
  5. Step 5: Solve for x
    x = 549,050,270,951.82/812,375.39
  6. Step 6: Final answer
    x = 675,857.83

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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.