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Finding the Fourth Proportional to 2,687.82, 3,708.63 and 1,943.43

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Solution

The fourth proportional to 2,687.82, 3,708.63 and 1,943.43 is: 2,681.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.82 : 3,708.63 = 1,943.43 : x
  2. Step 2: Convert to fraction form
    2,687.82/3,708.63 = 1,943.43/x
  3. Step 3: Cross multiply
    2,687.82x = 3,708.63 × 1,943.43
  4. Step 4: Simplify right side
    2,687.82x = 7,207,462.80
  5. Step 5: Solve for x
    x = 7,207,462.80/2,687.82
  6. Step 6: Final answer
    x = 2,681.53

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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.