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Finding the Fourth Proportional to 664,591.80, 996,984.90 and 215,236.20

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Solution

The fourth proportional to 664,591.80, 996,984.90 and 215,236.20 is: 322,885.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,591.80 : 996,984.90 = 215,236.20 : x
  2. Step 2: Convert to fraction form
    664,591.80/996,984.90 = 215,236.20/x
  3. Step 3: Cross multiply
    664,591.80x = 996,984.90 × 215,236.20
  4. Step 4: Simplify right side
    664,591.80x = 214,587,241,333.38
  5. Step 5: Solve for x
    x = 214,587,241,333.38/664,591.80
  6. Step 6: Final answer
    x = 322,885.78

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Half scale
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Double scale
Find fourth proportional to 664,592.80, 996,986.40 and 215,237.20
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.