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Finding the Fourth Proportional to 283,992.96, 391,909.75 and 154,931.44

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Solution

The fourth proportional to 283,992.96, 391,909.75 and 154,931.44 is: 213,805.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,992.96 : 391,909.75 = 154,931.44 : x
  2. Step 2: Convert to fraction form
    283,992.96/391,909.75 = 154,931.44/x
  3. Step 3: Cross multiply
    283,992.96x = 391,909.75 × 154,931.44
  4. Step 4: Simplify right side
    283,992.96x = 60,719,139,183.33
  5. Step 5: Solve for x
    x = 60,719,139,183.33/283,992.96
  6. Step 6: Final answer
    x = 213,805.09

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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.