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Finding the Fourth Proportional to 691,998.01, 954,935.60 and 405,708.78

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Solution

The fourth proportional to 691,998.01, 954,935.60 and 405,708.78 is: 559,865.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,998.01 : 954,935.60 = 405,708.78 : x
  2. Step 2: Convert to fraction form
    691,998.01/954,935.60 = 405,708.78/x
  3. Step 3: Cross multiply
    691,998.01x = 954,935.60 × 405,708.78
  4. Step 4: Simplify right side
    691,998.01x = 387,425,757,254.57
  5. Step 5: Solve for x
    x = 387,425,757,254.57/691,998.01
  6. Step 6: Final answer
    x = 559,865.42

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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.