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Finding the Fourth Proportional to 812,797.09, 1,121,696.90 and 450,220.91

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Solution

The fourth proportional to 812,797.09, 1,121,696.90 and 450,220.91 is: 621,325.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,797.09 : 1,121,696.90 = 450,220.91 : x
  2. Step 2: Convert to fraction form
    812,797.09/1,121,696.90 = 450,220.91/x
  3. Step 3: Cross multiply
    812,797.09x = 1,121,696.90 × 450,220.91
  4. Step 4: Simplify right side
    812,797.09x = 505,011,392,890.92
  5. Step 5: Solve for x
    x = 505,011,392,890.92/812,797.09
  6. Step 6: Final answer
    x = 621,325.30

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Half scale
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Double scale
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Similar ratio
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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.