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Finding the Fourth Proportional to 643,886.20, 965,829.30 and 223,204.60

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Solution

The fourth proportional to 643,886.20, 965,829.30 and 223,204.60 is: 334,806.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,886.20 : 965,829.30 = 223,204.60 : x
  2. Step 2: Convert to fraction form
    643,886.20/965,829.30 = 223,204.60/x
  3. Step 3: Cross multiply
    643,886.20x = 965,829.30 × 223,204.60
  4. Step 4: Simplify right side
    643,886.20x = 215,577,542,574.78
  5. Step 5: Solve for x
    x = 215,577,542,574.78/643,886.20
  6. Step 6: Final answer
    x = 334,806.90

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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.