Home / 2,181.11-3,271.89-720.27

Finding the Fourth Proportional to 2,181.11, 3,271.89 and 720.27

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Solution

The fourth proportional to 2,181.11, 3,271.89 and 720.27 is: 1,080.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.11 : 3,271.89 = 720.27 : x
  2. Step 2: Convert to fraction form
    2,181.11/3,271.89 = 720.27/x
  3. Step 3: Cross multiply
    2,181.11x = 3,271.89 × 720.27
  4. Step 4: Simplify right side
    2,181.11x = 2,356,644.21
  5. Step 5: Solve for x
    x = 2,356,644.21/2,181.11
  6. Step 6: Final answer
    x = 1,080.48

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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.