Home / 1,638.11-2,453.49-1,271.79

Finding the Fourth Proportional to 1,638.11, 2,453.49 and 1,271.79

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Solution

The fourth proportional to 1,638.11, 2,453.49 and 1,271.79 is: 1,904.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.11 : 2,453.49 = 1,271.79 : x
  2. Step 2: Convert to fraction form
    1,638.11/2,453.49 = 1,271.79/x
  3. Step 3: Cross multiply
    1,638.11x = 2,453.49 × 1,271.79
  4. Step 4: Simplify right side
    1,638.11x = 3,120,324.05
  5. Step 5: Solve for x
    x = 3,120,324.05/1,638.11
  6. Step 6: Final answer
    x = 1,904.83

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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.