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Finding the Fourth Proportional to 2,628.82, 3,942.11 and 984.22

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Solution

The fourth proportional to 2,628.82, 3,942.11 and 984.22 is: 1,475.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.82 : 3,942.11 = 984.22 : x
  2. Step 2: Convert to fraction form
    2,628.82/3,942.11 = 984.22/x
  3. Step 3: Cross multiply
    2,628.82x = 3,942.11 × 984.22
  4. Step 4: Simplify right side
    2,628.82x = 3,879,896.11
  5. Step 5: Solve for x
    x = 3,879,896.11/2,628.82
  6. Step 6: Final answer
    x = 1,475.91

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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.