Home / 1,638.29-2,259.11-1,217.97

Finding the Fourth Proportional to 1,638.29, 2,259.11 and 1,217.97

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Solution

The fourth proportional to 1,638.29, 2,259.11 and 1,217.97 is: 1,679.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.29 : 2,259.11 = 1,217.97 : x
  2. Step 2: Convert to fraction form
    1,638.29/2,259.11 = 1,217.97/x
  3. Step 3: Cross multiply
    1,638.29x = 2,259.11 × 1,217.97
  4. Step 4: Simplify right side
    1,638.29x = 2,751,531.25
  5. Step 5: Solve for x
    x = 2,751,531.25/1,638.29
  6. Step 6: Final answer
    x = 1,679.51

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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.