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Finding the Fourth Proportional to 812,104.80, 1,215,532.80 and 633,645.60

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Solution

The fourth proportional to 812,104.80, 1,215,532.80 and 633,645.60 is: 948,420.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,104.80 : 1,215,532.80 = 633,645.60 : x
  2. Step 2: Convert to fraction form
    812,104.80/1,215,532.80 = 633,645.60/x
  3. Step 3: Cross multiply
    812,104.80x = 1,215,532.80 × 633,645.60
  4. Step 4: Simplify right side
    812,104.80x = 770,217,010,375.68
  5. Step 5: Solve for x
    x = 770,217,010,375.68/812,104.80
  6. Step 6: Final answer
    x = 948,420.71

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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.