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Finding the Fourth Proportional to 817,793.55, 1,226,690.33 and 419,212.80

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Solution

The fourth proportional to 817,793.55, 1,226,690.33 and 419,212.80 is: 628,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,793.55 : 1,226,690.33 = 419,212.80 : x
  2. Step 2: Convert to fraction form
    817,793.55/1,226,690.33 = 419,212.80/x
  3. Step 3: Cross multiply
    817,793.55x = 1,226,690.33 × 419,212.80
  4. Step 4: Simplify right side
    817,793.55x = 514,244,285,876.16
  5. Step 5: Solve for x
    x = 514,244,285,876.16/817,793.55
  6. Step 6: Final answer
    x = 628,819.20

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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.