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Finding the Fourth Proportional to 519,754.60, 779,631.90 and 253,685.80

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Solution

The fourth proportional to 519,754.60, 779,631.90 and 253,685.80 is: 380,528.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,754.60 : 779,631.90 = 253,685.80 : x
  2. Step 2: Convert to fraction form
    519,754.60/779,631.90 = 253,685.80/x
  3. Step 3: Cross multiply
    519,754.60x = 779,631.90 × 253,685.80
  4. Step 4: Simplify right side
    519,754.60x = 197,781,542,257.02
  5. Step 5: Solve for x
    x = 197,781,542,257.02/519,754.60
  6. Step 6: Final answer
    x = 380,528.70

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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.