Home / 2,720.51-4,082.82-1,991.96

Finding the Fourth Proportional to 2,720.51, 4,082.82 and 1,991.96

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Solution

The fourth proportional to 2,720.51, 4,082.82 and 1,991.96 is: 2,989.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.51 : 4,082.82 = 1,991.96 : x
  2. Step 2: Convert to fraction form
    2,720.51/4,082.82 = 1,991.96/x
  3. Step 3: Cross multiply
    2,720.51x = 4,082.82 × 1,991.96
  4. Step 4: Simplify right side
    2,720.51x = 8,132,814.13
  5. Step 5: Solve for x
    x = 8,132,814.13/2,720.51
  6. Step 6: Final answer
    x = 2,989.44

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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.