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Finding the Fourth Proportional to 625,435.05, 863,524.05 and 396,195.78

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Solution

The fourth proportional to 625,435.05, 863,524.05 and 396,195.78 is: 547,018.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,435.05 : 863,524.05 = 396,195.78 : x
  2. Step 2: Convert to fraction form
    625,435.05/863,524.05 = 396,195.78/x
  3. Step 3: Cross multiply
    625,435.05x = 863,524.05 × 396,195.78
  4. Step 4: Simplify right side
    625,435.05x = 342,124,584,538.51
  5. Step 5: Solve for x
    x = 342,124,584,538.51/625,435.05
  6. Step 6: Final answer
    x = 547,018.57

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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.