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Finding the Fourth Proportional to 512,933.70, 769,400.55 and 505,935.30

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Solution

The fourth proportional to 512,933.70, 769,400.55 and 505,935.30 is: 758,902.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,933.70 : 769,400.55 = 505,935.30 : x
  2. Step 2: Convert to fraction form
    512,933.70/769,400.55 = 505,935.30/x
  3. Step 3: Cross multiply
    512,933.70x = 769,400.55 × 505,935.30
  4. Step 4: Simplify right side
    512,933.70x = 389,266,898,084.42
  5. Step 5: Solve for x
    x = 389,266,898,084.42/512,933.70
  6. Step 6: Final answer
    x = 758,902.95

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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.