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Finding the Fourth Proportional to 643,466.70, 965,200.05 and 170,199.90

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Solution

The fourth proportional to 643,466.70, 965,200.05 and 170,199.90 is: 255,299.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,466.70 : 965,200.05 = 170,199.90 : x
  2. Step 2: Convert to fraction form
    643,466.70/965,200.05 = 170,199.90/x
  3. Step 3: Cross multiply
    643,466.70x = 965,200.05 × 170,199.90
  4. Step 4: Simplify right side
    643,466.70x = 164,276,951,990.00
  5. Step 5: Solve for x
    x = 164,276,951,990.00/643,466.70
  6. Step 6: Final answer
    x = 255,299.85

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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.