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Finding the Fourth Proportional to 427,659.56, 641,703.18 and 191,171.96

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Solution

The fourth proportional to 427,659.56, 641,703.18 and 191,171.96 is: 286,853.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,659.56 : 641,703.18 = 191,171.96 : x
  2. Step 2: Convert to fraction form
    427,659.56/641,703.18 = 191,171.96/x
  3. Step 3: Cross multiply
    427,659.56x = 641,703.18 × 191,171.96
  4. Step 4: Simplify right side
    427,659.56x = 122,675,654,658.83
  5. Step 5: Solve for x
    x = 122,675,654,658.83/427,659.56
  6. Step 6: Final answer
    x = 286,853.53

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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.