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Finding the Fourth Proportional to 812,448.92, 1,121,165.84 and 449,865

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Solution

The fourth proportional to 812,448.92, 1,121,165.84 and 449,865 is: 620,806.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,448.92 : 1,121,165.84 = 449,865 : x
  2. Step 2: Convert to fraction form
    812,448.92/1,121,165.84 = 449,865/x
  3. Step 3: Cross multiply
    812,448.92x = 1,121,165.84 × 449,865
  4. Step 4: Simplify right side
    812,448.92x = 504,373,270,611.60
  5. Step 5: Solve for x
    x = 504,373,270,611.60/812,448.92
  6. Step 6: Final answer
    x = 620,806.13

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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.