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Finding the Fourth Proportional to 2,170.46, 3,255.83 and 871.92

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Solution

The fourth proportional to 2,170.46, 3,255.83 and 871.92 is: 1,307.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.46 : 3,255.83 = 871.92 : x
  2. Step 2: Convert to fraction form
    2,170.46/3,255.83 = 871.92/x
  3. Step 3: Cross multiply
    2,170.46x = 3,255.83 × 871.92
  4. Step 4: Simplify right side
    2,170.46x = 2,838,837.68
  5. Step 5: Solve for x
    x = 2,838,837.68/2,170.46
  6. Step 6: Final answer
    x = 1,307.95

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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.