Home / 812,920.66-1,121,739.91-450,253.69

Finding the Fourth Proportional to 812,920.66, 1,121,739.91 and 450,253.69

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Solution

The fourth proportional to 812,920.66, 1,121,739.91 and 450,253.69 is: 621,299.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,920.66 : 1,121,739.91 = 450,253.69 : x
  2. Step 2: Convert to fraction form
    812,920.66/1,121,739.91 = 450,253.69/x
  3. Step 3: Cross multiply
    812,920.66x = 1,121,739.91 × 450,253.69
  4. Step 4: Simplify right side
    812,920.66x = 505,067,529,767.78
  5. Step 5: Solve for x
    x = 505,067,529,767.78/812,920.66
  6. Step 6: Final answer
    x = 621,299.91

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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.