Home / 521,512.20-782,268.30-205,806.60

Finding the Fourth Proportional to 521,512.20, 782,268.30 and 205,806.60

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Solution

The fourth proportional to 521,512.20, 782,268.30 and 205,806.60 is: 308,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,512.20 : 782,268.30 = 205,806.60 : x
  2. Step 2: Convert to fraction form
    521,512.20/782,268.30 = 205,806.60/x
  3. Step 3: Cross multiply
    521,512.20x = 782,268.30 × 205,806.60
  4. Step 4: Simplify right side
    521,512.20x = 160,995,979,110.78
  5. Step 5: Solve for x
    x = 160,995,979,110.78/521,512.20
  6. Step 6: Final answer
    x = 308,709.90

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Similar ratio
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1.5x scale

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.