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Finding the Fourth Proportional to 638,627.67, 880,976.37 and 396,818.37

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Solution

The fourth proportional to 638,627.67, 880,976.37 and 396,818.37 is: 547,404.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,627.67 : 880,976.37 = 396,818.37 : x
  2. Step 2: Convert to fraction form
    638,627.67/880,976.37 = 396,818.37/x
  3. Step 3: Cross multiply
    638,627.67x = 880,976.37 × 396,818.37
  4. Step 4: Simplify right side
    638,627.67x = 349,587,607,151.92
  5. Step 5: Solve for x
    x = 349,587,607,151.92/638,627.67
  6. Step 6: Final answer
    x = 547,404.42

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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.