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Finding the Fourth Proportional to 664,234.60, 996,351.90 and 439,848.40

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Solution

The fourth proportional to 664,234.60, 996,351.90 and 439,848.40 is: 659,772.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,234.60 : 996,351.90 = 439,848.40 : x
  2. Step 2: Convert to fraction form
    664,234.60/996,351.90 = 439,848.40/x
  3. Step 3: Cross multiply
    664,234.60x = 996,351.90 × 439,848.40
  4. Step 4: Simplify right side
    664,234.60x = 438,243,789,051.96
  5. Step 5: Solve for x
    x = 438,243,789,051.96/664,234.60
  6. Step 6: Final answer
    x = 659,772.60

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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.