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Finding the Fourth Proportional to 519,872.70, 779,809.05 and 512,874.30

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Solution

The fourth proportional to 519,872.70, 779,809.05 and 512,874.30 is: 769,311.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,872.70 : 779,809.05 = 512,874.30 : x
  2. Step 2: Convert to fraction form
    519,872.70/779,809.05 = 512,874.30/x
  3. Step 3: Cross multiply
    519,872.70x = 779,809.05 × 512,874.30
  4. Step 4: Simplify right side
    519,872.70x = 399,944,020,652.42
  5. Step 5: Solve for x
    x = 399,944,020,652.42/519,872.70
  6. Step 6: Final answer
    x = 769,311.45

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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.