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Finding the Fourth Proportional to 620,998.20, 931,497.30 and 451,724.40

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Solution

The fourth proportional to 620,998.20, 931,497.30 and 451,724.40 is: 677,586.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,998.20 : 931,497.30 = 451,724.40 : x
  2. Step 2: Convert to fraction form
    620,998.20/931,497.30 = 451,724.40/x
  3. Step 3: Cross multiply
    620,998.20x = 931,497.30 × 451,724.40
  4. Step 4: Simplify right side
    620,998.20x = 420,780,058,944.12
  5. Step 5: Solve for x
    x = 420,780,058,944.12/620,998.20
  6. Step 6: Final answer
    x = 677,586.60

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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.