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Finding the Fourth Proportional to 664,523.40, 996,785.10 and 619,908.60

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Solution

The fourth proportional to 664,523.40, 996,785.10 and 619,908.60 is: 929,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,523.40 : 996,785.10 = 619,908.60 : x
  2. Step 2: Convert to fraction form
    664,523.40/996,785.10 = 619,908.60/x
  3. Step 3: Cross multiply
    664,523.40x = 996,785.10 × 619,908.60
  4. Step 4: Simplify right side
    664,523.40x = 617,915,655,841.86
  5. Step 5: Solve for x
    x = 617,915,655,841.86/664,523.40
  6. Step 6: Final answer
    x = 929,862.90

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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.