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Finding the Fourth Proportional to 3,991.82, 5,983.68 and 1,908.77

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Solution

The fourth proportional to 3,991.82, 5,983.68 and 1,908.77 is: 2,861.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.82 : 5,983.68 = 1,908.77 : x
  2. Step 2: Convert to fraction form
    3,991.82/5,983.68 = 1,908.77/x
  3. Step 3: Cross multiply
    3,991.82x = 5,983.68 × 1,908.77
  4. Step 4: Simplify right side
    3,991.82x = 11,421,483.83
  5. Step 5: Solve for x
    x = 11,421,483.83/3,991.82
  6. Step 6: Final answer
    x = 2,861.22

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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.