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Finding the Fourth Proportional to 396,377.76, 547,455.60 and 261,016.86

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Solution

The fourth proportional to 396,377.76, 547,455.60 and 261,016.86 is: 360,502.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,377.76 : 547,455.60 = 261,016.86 : x
  2. Step 2: Convert to fraction form
    396,377.76/547,455.60 = 261,016.86/x
  3. Step 3: Cross multiply
    396,377.76x = 547,455.60 × 261,016.86
  4. Step 4: Simplify right side
    396,377.76x = 142,895,141,701.42
  5. Step 5: Solve for x
    x = 142,895,141,701.42/396,377.76
  6. Step 6: Final answer
    x = 360,502.42

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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.