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Finding the Fourth Proportional to 2,176.57, 3,265.26 and 715.83

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Solution

The fourth proportional to 2,176.57, 3,265.26 and 715.83 is: 1,073.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.57 : 3,265.26 = 715.83 : x
  2. Step 2: Convert to fraction form
    2,176.57/3,265.26 = 715.83/x
  3. Step 3: Cross multiply
    2,176.57x = 3,265.26 × 715.83
  4. Step 4: Simplify right side
    2,176.57x = 2,337,371.07
  5. Step 5: Solve for x
    x = 2,337,371.07/2,176.57
  6. Step 6: Final answer
    x = 1,073.88

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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.