Home / 2,628.17-3,942.26-680.39

Finding the Fourth Proportional to 2,628.17, 3,942.26 and 680.39

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Solution

The fourth proportional to 2,628.17, 3,942.26 and 680.39 is: 1,020.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.17 : 3,942.26 = 680.39 : x
  2. Step 2: Convert to fraction form
    2,628.17/3,942.26 = 680.39/x
  3. Step 3: Cross multiply
    2,628.17x = 3,942.26 × 680.39
  4. Step 4: Simplify right side
    2,628.17x = 2,682,274.28
  5. Step 5: Solve for x
    x = 2,682,274.28/2,628.17
  6. Step 6: Final answer
    x = 1,020.59

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Similar ratio
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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.