Home / 2,185.28-3,278.22-724.58

Finding the Fourth Proportional to 2,185.28, 3,278.22 and 724.58

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Solution

The fourth proportional to 2,185.28, 3,278.22 and 724.58 is: 1,086.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.28 : 3,278.22 = 724.58 : x
  2. Step 2: Convert to fraction form
    2,185.28/3,278.22 = 724.58/x
  3. Step 3: Cross multiply
    2,185.28x = 3,278.22 × 724.58
  4. Step 4: Simplify right side
    2,185.28x = 2,375,332.65
  5. Step 5: Solve for x
    x = 2,375,332.65/2,185.28
  6. Step 6: Final answer
    x = 1,086.97

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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.