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Finding the Fourth Proportional to 639,609.11, 882,658.11 and 353,127.09

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Solution

The fourth proportional to 639,609.11, 882,658.11 and 353,127.09 is: 487,314.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,609.11 : 882,658.11 = 353,127.09 : x
  2. Step 2: Convert to fraction form
    639,609.11/882,658.11 = 353,127.09/x
  3. Step 3: Cross multiply
    639,609.11x = 882,658.11 × 353,127.09
  4. Step 4: Simplify right side
    639,609.11x = 311,690,489,849.20
  5. Step 5: Solve for x
    x = 311,690,489,849.20/639,609.11
  6. Step 6: Final answer
    x = 487,314.03

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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.