Home / 2,185.80-3,279.17-724.90

Finding the Fourth Proportional to 2,185.80, 3,279.17 and 724.90

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Solution

The fourth proportional to 2,185.80, 3,279.17 and 724.90 is: 1,087.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.80 : 3,279.17 = 724.90 : x
  2. Step 2: Convert to fraction form
    2,185.80/3,279.17 = 724.90/x
  3. Step 3: Cross multiply
    2,185.80x = 3,279.17 × 724.90
  4. Step 4: Simplify right side
    2,185.80x = 2,377,070.33
  5. Step 5: Solve for x
    x = 2,377,070.33/2,185.80
  6. Step 6: Final answer
    x = 1,087.51

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1.5x scale

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.