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Finding the Fourth Proportional to 519,877.20, 779,815.80 and 253,500.60

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Solution

The fourth proportional to 519,877.20, 779,815.80 and 253,500.60 is: 380,250.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,877.20 : 779,815.80 = 253,500.60 : x
  2. Step 2: Convert to fraction form
    519,877.20/779,815.80 = 253,500.60/x
  3. Step 3: Cross multiply
    519,877.20x = 779,815.80 × 253,500.60
  4. Step 4: Simplify right side
    519,877.20x = 197,683,773,189.48
  5. Step 5: Solve for x
    x = 197,683,773,189.48/519,877.20
  6. Step 6: Final answer
    x = 380,250.90

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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.