Home / 1,760.20-2,640.66-720.04

Finding the Fourth Proportional to 1,760.20, 2,640.66 and 720.04

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Solution

The fourth proportional to 1,760.20, 2,640.66 and 720.04 is: 1,080.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.20 : 2,640.66 = 720.04 : x
  2. Step 2: Convert to fraction form
    1,760.20/2,640.66 = 720.04/x
  3. Step 3: Cross multiply
    1,760.20x = 2,640.66 × 720.04
  4. Step 4: Simplify right side
    1,760.20x = 1,901,380.83
  5. Step 5: Solve for x
    x = 1,901,380.83/1,760.20
  6. Step 6: Final answer
    x = 1,080.21

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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.