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Finding the Fourth Proportional to 686,991.66, 948,030.20 and 396,593.43

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Solution

The fourth proportional to 686,991.66, 948,030.20 and 396,593.43 is: 547,288.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,991.66 : 948,030.20 = 396,593.43 : x
  2. Step 2: Convert to fraction form
    686,991.66/948,030.20 = 396,593.43/x
  3. Step 3: Cross multiply
    686,991.66x = 948,030.20 × 396,593.43
  4. Step 4: Simplify right side
    686,991.66x = 375,982,548,761.59
  5. Step 5: Solve for x
    x = 375,982,548,761.59/686,991.66
  6. Step 6: Final answer
    x = 547,288.37

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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.