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Finding the Fourth Proportional to 512,685.60, 769,028.40 and 246,381.90

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Solution

The fourth proportional to 512,685.60, 769,028.40 and 246,381.90 is: 369,572.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,685.60 : 769,028.40 = 246,381.90 : x
  2. Step 2: Convert to fraction form
    512,685.60/769,028.40 = 246,381.90/x
  3. Step 3: Cross multiply
    512,685.60x = 769,028.40 × 246,381.90
  4. Step 4: Simplify right side
    512,685.60x = 189,474,678,345.96
  5. Step 5: Solve for x
    x = 189,474,678,345.96/512,685.60
  6. Step 6: Final answer
    x = 369,572.85

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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.