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Finding the Fourth Proportional to 3,687.68, 5,082 and 2,637.92

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Solution

The fourth proportional to 3,687.68, 5,082 and 2,637.92 is: 3,635.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,687.68 : 5,082 = 2,637.92 : x
  2. Step 2: Convert to fraction form
    3,687.68/5,082 = 2,637.92/x
  3. Step 3: Cross multiply
    3,687.68x = 5,082 × 2,637.92
  4. Step 4: Simplify right side
    3,687.68x = 13,405,909.44
  5. Step 5: Solve for x
    x = 13,405,909.44/3,687.68
  6. Step 6: Final answer
    x = 3,635.32

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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.