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Finding the Fourth Proportional to 664,521.40, 996,782.10 and 619,906.60

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Solution

The fourth proportional to 664,521.40, 996,782.10 and 619,906.60 is: 929,859.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,521.40 : 996,782.10 = 619,906.60 : x
  2. Step 2: Convert to fraction form
    664,521.40/996,782.10 = 619,906.60/x
  3. Step 3: Cross multiply
    664,521.40x = 996,782.10 × 619,906.60
  4. Step 4: Simplify right side
    664,521.40x = 617,911,802,551.86
  5. Step 5: Solve for x
    x = 617,911,802,551.86/664,521.40
  6. Step 6: Final answer
    x = 929,859.90

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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.