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Finding the Fourth Proportional to 664,359.40, 996,539.10 and 646,863.40

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Solution

The fourth proportional to 664,359.40, 996,539.10 and 646,863.40 is: 970,295.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,359.40 : 996,539.10 = 646,863.40 : x
  2. Step 2: Convert to fraction form
    664,359.40/996,539.10 = 646,863.40/x
  3. Step 3: Cross multiply
    664,359.40x = 996,539.10 × 646,863.40
  4. Step 4: Simplify right side
    664,359.40x = 644,624,670,458.94
  5. Step 5: Solve for x
    x = 644,624,670,458.94/664,359.40
  6. Step 6: Final answer
    x = 970,295.10

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Half scale
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Double scale
Find fourth proportional to 664,360.40, 996,540.60 and 646,864.40
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.