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Finding the Fourth Proportional to 519,855.70, 779,783.55 and 512,857.30

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Solution

The fourth proportional to 519,855.70, 779,783.55 and 512,857.30 is: 769,285.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,855.70 : 779,783.55 = 512,857.30 : x
  2. Step 2: Convert to fraction form
    519,855.70/779,783.55 = 512,857.30/x
  3. Step 3: Cross multiply
    519,855.70x = 779,783.55 × 512,857.30
  4. Step 4: Simplify right side
    519,855.70x = 399,917,686,037.42
  5. Step 5: Solve for x
    x = 399,917,686,037.42/519,855.70
  6. Step 6: Final answer
    x = 769,285.95

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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.