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Finding the Fourth Proportional to 697,793.56, 962,978.36 and 391,923.76

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Solution

The fourth proportional to 697,793.56, 962,978.36 and 391,923.76 is: 540,867.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,793.56 : 962,978.36 = 391,923.76 : x
  2. Step 2: Convert to fraction form
    697,793.56/962,978.36 = 391,923.76/x
  3. Step 3: Cross multiply
    697,793.56x = 962,978.36 × 391,923.76
  4. Step 4: Simplify right side
    697,793.56x = 377,414,099,649.83
  5. Step 5: Solve for x
    x = 377,414,099,649.83/697,793.56
  6. Step 6: Final answer
    x = 540,867.85

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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.