Home / 812,371.30-1,121,107.41-449,795.16

Finding the Fourth Proportional to 812,371.30, 1,121,107.41 and 449,795.16

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Solution

The fourth proportional to 812,371.30, 1,121,107.41 and 449,795.16 is: 620,736.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,371.30 : 1,121,107.41 = 449,795.16 : x
  2. Step 2: Convert to fraction form
    812,371.30/1,121,107.41 = 449,795.16/x
  3. Step 3: Cross multiply
    812,371.30x = 1,121,107.41 × 449,795.16
  4. Step 4: Simplify right side
    812,371.30x = 504,268,686,858.14
  5. Step 5: Solve for x
    x = 504,268,686,858.14/812,371.30
  6. Step 6: Final answer
    x = 620,736.71

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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.