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Finding the Fourth Proportional to 515,905.19, 711,949.17 and 289,550.69

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Solution

The fourth proportional to 515,905.19, 711,949.17 and 289,550.69 is: 399,579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,905.19 : 711,949.17 = 289,550.69 : x
  2. Step 2: Convert to fraction form
    515,905.19/711,949.17 = 289,550.69/x
  3. Step 3: Cross multiply
    515,905.19x = 711,949.17 × 289,550.69
  4. Step 4: Simplify right side
    515,905.19x = 206,145,375,198.30
  5. Step 5: Solve for x
    x = 206,145,375,198.30/515,905.19
  6. Step 6: Final answer
    x = 399,579.96

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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.