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Finding the Fourth Proportional to 698,712.01, 964,169.47 and 392,739.78

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Solution

The fourth proportional to 698,712.01, 964,169.47 and 392,739.78 is: 541,951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,712.01 : 964,169.47 = 392,739.78 : x
  2. Step 2: Convert to fraction form
    698,712.01/964,169.47 = 392,739.78/x
  3. Step 3: Cross multiply
    698,712.01x = 964,169.47 × 392,739.78
  4. Step 4: Simplify right side
    698,712.01x = 378,667,705,530.52
  5. Step 5: Solve for x
    x = 378,667,705,530.52/698,712.01
  6. Step 6: Final answer
    x = 541,951.05

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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.