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Finding the Fourth Proportional to 677,469.14, 934,840.05 and 391,081.49

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Solution

The fourth proportional to 677,469.14, 934,840.05 and 391,081.49 is: 539,653.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,469.14 : 934,840.05 = 391,081.49 : x
  2. Step 2: Convert to fraction form
    677,469.14/934,840.05 = 391,081.49/x
  3. Step 3: Cross multiply
    677,469.14x = 934,840.05 × 391,081.49
  4. Step 4: Simplify right side
    677,469.14x = 365,598,639,665.68
  5. Step 5: Solve for x
    x = 365,598,639,665.68/677,469.14
  6. Step 6: Final answer
    x = 539,653.57

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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.