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Finding the Fourth Proportional to 619,115.15, 854,016.92 and 389,308.73

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Solution

The fourth proportional to 619,115.15, 854,016.92 and 389,308.73 is: 537,018.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,115.15 : 854,016.92 = 389,308.73 : x
  2. Step 2: Convert to fraction form
    619,115.15/854,016.92 = 389,308.73/x
  3. Step 3: Cross multiply
    619,115.15x = 854,016.92 × 389,308.73
  4. Step 4: Simplify right side
    619,115.15x = 332,476,242,523.71
  5. Step 5: Solve for x
    x = 332,476,242,523.71/619,115.15
  6. Step 6: Final answer
    x = 537,018.42

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Double scale
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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.