Home / 2,139.80-3,207.81-1,028.66

Finding the Fourth Proportional to 2,139.80, 3,207.81 and 1,028.66

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Solution

The fourth proportional to 2,139.80, 3,207.81 and 1,028.66 is: 1,542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.80 : 3,207.81 = 1,028.66 : x
  2. Step 2: Convert to fraction form
    2,139.80/3,207.81 = 1,028.66/x
  3. Step 3: Cross multiply
    2,139.80x = 3,207.81 × 1,028.66
  4. Step 4: Simplify right side
    2,139.80x = 3,299,729.80
  5. Step 5: Solve for x
    x = 3,299,729.80/2,139.80
  6. Step 6: Final answer
    x = 1,542.08

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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.