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Finding the Fourth Proportional to 680,806.74, 1,020,884.12 and 396,578.07

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Solution

The fourth proportional to 680,806.74, 1,020,884.12 and 396,578.07 is: 594,677.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,806.74 : 1,020,884.12 = 396,578.07 : x
  2. Step 2: Convert to fraction form
    680,806.74/1,020,884.12 = 396,578.07/x
  3. Step 3: Cross multiply
    680,806.74x = 1,020,884.12 × 396,578.07
  4. Step 4: Simplify right side
    680,806.74x = 404,860,252,020.36
  5. Step 5: Solve for x
    x = 404,860,252,020.36/680,806.74
  6. Step 6: Final answer
    x = 594,677.21

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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.