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Finding the Fourth Proportional to 625,431.12, 863,518.62 and 396,191.82

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Solution

The fourth proportional to 625,431.12, 863,518.62 and 396,191.82 is: 547,013.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,431.12 : 863,518.62 = 396,191.82 : x
  2. Step 2: Convert to fraction form
    625,431.12/863,518.62 = 396,191.82/x
  3. Step 3: Cross multiply
    625,431.12x = 863,518.62 × 396,191.82
  4. Step 4: Simplify right side
    625,431.12x = 342,119,013,661.69
  5. Step 5: Solve for x
    x = 342,119,013,661.69/625,431.12
  6. Step 6: Final answer
    x = 547,013.10

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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.