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Finding the Fourth Proportional to 2,960.76, 4,086 and 1,634.61

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Solution

The fourth proportional to 2,960.76, 4,086 and 1,634.61 is: 2,255.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,960.76 : 4,086 = 1,634.61 : x
  2. Step 2: Convert to fraction form
    2,960.76/4,086 = 1,634.61/x
  3. Step 3: Cross multiply
    2,960.76x = 4,086 × 1,634.61
  4. Step 4: Simplify right side
    2,960.76x = 6,679,016.46
  5. Step 5: Solve for x
    x = 6,679,016.46/2,960.76
  6. Step 6: Final answer
    x = 2,255.85

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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.