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Finding the Fourth Proportional to 415,403.66, 623,217.08 and 131,105.21

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Solution

The fourth proportional to 415,403.66, 623,217.08 and 131,105.21 is: 196,693.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,403.66 : 623,217.08 = 131,105.21 : x
  2. Step 2: Convert to fraction form
    415,403.66/623,217.08 = 131,105.21/x
  3. Step 3: Cross multiply
    415,403.66x = 623,217.08 × 131,105.21
  4. Step 4: Simplify right side
    415,403.66x = 81,707,002,377.38
  5. Step 5: Solve for x
    x = 81,707,002,377.38/415,403.66
  6. Step 6: Final answer
    x = 196,693.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.