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Finding the Fourth Proportional to 664,422.40, 996,633.60 and 619,807.60

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Solution

The fourth proportional to 664,422.40, 996,633.60 and 619,807.60 is: 929,711.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,422.40 : 996,633.60 = 619,807.60 : x
  2. Step 2: Convert to fraction form
    664,422.40/996,633.60 = 619,807.60/x
  3. Step 3: Cross multiply
    664,422.40x = 996,633.60 × 619,807.60
  4. Step 4: Simplify right side
    664,422.40x = 617,721,079,695.36
  5. Step 5: Solve for x
    x = 617,721,079,695.36/664,422.40
  6. Step 6: Final answer
    x = 929,711.40

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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.