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Finding the Fourth Proportional to 2,605.62, 3,908.79 and 873.66

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Solution

The fourth proportional to 2,605.62, 3,908.79 and 873.66 is: 1,310.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.62 : 3,908.79 = 873.66 : x
  2. Step 2: Convert to fraction form
    2,605.62/3,908.79 = 873.66/x
  3. Step 3: Cross multiply
    2,605.62x = 3,908.79 × 873.66
  4. Step 4: Simplify right side
    2,605.62x = 3,414,953.47
  5. Step 5: Solve for x
    x = 3,414,953.47/2,605.62
  6. Step 6: Final answer
    x = 1,310.61

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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.