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Finding the Fourth Proportional to 2,628.02, 3,942.10 and 872.46

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Solution

The fourth proportional to 2,628.02, 3,942.10 and 872.46 is: 1,308.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.02 : 3,942.10 = 872.46 : x
  2. Step 2: Convert to fraction form
    2,628.02/3,942.10 = 872.46/x
  3. Step 3: Cross multiply
    2,628.02x = 3,942.10 × 872.46
  4. Step 4: Simplify right side
    2,628.02x = 3,439,324.57
  5. Step 5: Solve for x
    x = 3,439,324.57/2,628.02
  6. Step 6: Final answer
    x = 1,308.71

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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.