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Finding the Fourth Proportional to 664,318.80, 996,478.20 and 571,006.80

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Solution

The fourth proportional to 664,318.80, 996,478.20 and 571,006.80 is: 856,510.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,318.80 : 996,478.20 = 571,006.80 : x
  2. Step 2: Convert to fraction form
    664,318.80/996,478.20 = 571,006.80/x
  3. Step 3: Cross multiply
    664,318.80x = 996,478.20 × 571,006.80
  4. Step 4: Simplify right side
    664,318.80x = 568,995,828,251.76
  5. Step 5: Solve for x
    x = 568,995,828,251.76/664,318.80
  6. Step 6: Final answer
    x = 856,510.20

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.