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Finding the Fourth Proportional to 2,628.28, 3,628.49 and 1,919.42

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Solution

The fourth proportional to 2,628.28, 3,628.49 and 1,919.42 is: 2,649.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.28 : 3,628.49 = 1,919.42 : x
  2. Step 2: Convert to fraction form
    2,628.28/3,628.49 = 1,919.42/x
  3. Step 3: Cross multiply
    2,628.28x = 3,628.49 × 1,919.42
  4. Step 4: Simplify right side
    2,628.28x = 6,964,568.54
  5. Step 5: Solve for x
    x = 6,964,568.54/2,628.28
  6. Step 6: Final answer
    x = 2,649.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.