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Finding the Fourth Proportional to 664,648.80, 996,973.20 and 384,712.80

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Solution

The fourth proportional to 664,648.80, 996,973.20 and 384,712.80 is: 577,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,648.80 : 996,973.20 = 384,712.80 : x
  2. Step 2: Convert to fraction form
    664,648.80/996,973.20 = 384,712.80/x
  3. Step 3: Cross multiply
    664,648.80x = 996,973.20 × 384,712.80
  4. Step 4: Simplify right side
    664,648.80x = 383,548,351,296.96
  5. Step 5: Solve for x
    x = 383,548,351,296.96/664,648.80
  6. Step 6: Final answer
    x = 577,069.20

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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.