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Finding the Fourth Proportional to 396,528.57, 547,209.90 and 215,240.40

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Solution

The fourth proportional to 396,528.57, 547,209.90 and 215,240.40 is: 297,032.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,528.57 : 547,209.90 = 215,240.40 : x
  2. Step 2: Convert to fraction form
    396,528.57/547,209.90 = 215,240.40/x
  3. Step 3: Cross multiply
    396,528.57x = 547,209.90 × 215,240.40
  4. Step 4: Simplify right side
    396,528.57x = 117,781,677,759.96
  5. Step 5: Solve for x
    x = 117,781,677,759.96/396,528.57
  6. Step 6: Final answer
    x = 297,032.01

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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.