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Finding the Fourth Proportional to 613,215.09, 919,822.89 and 275,861.70

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Solution

The fourth proportional to 613,215.09, 919,822.89 and 275,861.70 is: 413,792.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,215.09 : 919,822.89 = 275,861.70 : x
  2. Step 2: Convert to fraction form
    613,215.09/919,822.89 = 275,861.70/x
  3. Step 3: Cross multiply
    613,215.09x = 919,822.89 × 275,861.70
  4. Step 4: Simplify right side
    613,215.09x = 253,743,906,134.31
  5. Step 5: Solve for x
    x = 253,743,906,134.31/613,215.09
  6. Step 6: Final answer
    x = 413,792.66

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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.