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Finding the Fourth Proportional to 515,906.70, 711,951.24 and 289,552.20

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Solution

The fourth proportional to 515,906.70, 711,951.24 and 289,552.20 is: 399,582.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,906.70 : 711,951.24 = 289,552.20 : x
  2. Step 2: Convert to fraction form
    515,906.70/711,951.24 = 289,552.20/x
  3. Step 3: Cross multiply
    515,906.70x = 711,951.24 × 289,552.20
  4. Step 4: Simplify right side
    515,906.70x = 206,147,047,834.73
  5. Step 5: Solve for x
    x = 206,147,047,834.73/515,906.70
  6. Step 6: Final answer
    x = 399,582.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.