Home / 2,628.30-3,942.40-680.46

Finding the Fourth Proportional to 2,628.30, 3,942.40 and 680.46

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Solution

The fourth proportional to 2,628.30, 3,942.40 and 680.46 is: 1,020.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.30 : 3,942.40 = 680.46 : x
  2. Step 2: Convert to fraction form
    2,628.30/3,942.40 = 680.46/x
  3. Step 3: Cross multiply
    2,628.30x = 3,942.40 × 680.46
  4. Step 4: Simplify right side
    2,628.30x = 2,682,645.50
  5. Step 5: Solve for x
    x = 2,682,645.50/2,628.30
  6. Step 6: Final answer
    x = 1,020.68

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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.