Home / 1,638.33-2,451.30-1,330.75

Finding the Fourth Proportional to 1,638.33, 2,451.30 and 1,330.75

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Solution

The fourth proportional to 1,638.33, 2,451.30 and 1,330.75 is: 1,991.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.33 : 2,451.30 = 1,330.75 : x
  2. Step 2: Convert to fraction form
    1,638.33/2,451.30 = 1,330.75/x
  3. Step 3: Cross multiply
    1,638.33x = 2,451.30 × 1,330.75
  4. Step 4: Simplify right side
    1,638.33x = 3,262,067.48
  5. Step 5: Solve for x
    x = 3,262,067.48/1,638.33
  6. Step 6: Final answer
    x = 1,991.09

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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.