Home / 2,180.31-3,270.87-720.48

Finding the Fourth Proportional to 2,180.31, 3,270.87 and 720.48

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Solution

The fourth proportional to 2,180.31, 3,270.87 and 720.48 is: 1,080.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,180.31 : 3,270.87 = 720.48 : x
  2. Step 2: Convert to fraction form
    2,180.31/3,270.87 = 720.48/x
  3. Step 3: Cross multiply
    2,180.31x = 3,270.87 × 720.48
  4. Step 4: Simplify right side
    2,180.31x = 2,356,596.42
  5. Step 5: Solve for x
    x = 2,356,596.42/2,180.31
  6. Step 6: Final answer
    x = 1,080.85

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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.