Home / 2,181.80-3,272.24-720.62

Finding the Fourth Proportional to 2,181.80, 3,272.24 and 720.62

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Solution

The fourth proportional to 2,181.80, 3,272.24 and 720.62 is: 1,080.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.80 : 3,272.24 = 720.62 : x
  2. Step 2: Convert to fraction form
    2,181.80/3,272.24 = 720.62/x
  3. Step 3: Cross multiply
    2,181.80x = 3,272.24 × 720.62
  4. Step 4: Simplify right side
    2,181.80x = 2,358,021.62
  5. Step 5: Solve for x
    x = 2,358,021.62/2,181.80
  6. Step 6: Final answer
    x = 1,080.77

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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.