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Finding the Fourth Proportional to 2,167.75, 3,251.67 and 707.05

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Solution

The fourth proportional to 2,167.75, 3,251.67 and 707.05 is: 1,060.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.75 : 3,251.67 = 707.05 : x
  2. Step 2: Convert to fraction form
    2,167.75/3,251.67 = 707.05/x
  3. Step 3: Cross multiply
    2,167.75x = 3,251.67 × 707.05
  4. Step 4: Simplify right side
    2,167.75x = 2,299,093.27
  5. Step 5: Solve for x
    x = 2,299,093.27/2,167.75
  6. Step 6: Final answer
    x = 1,060.59

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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.