Home / 3,390.28-5,081.82-1,309.72

Finding the Fourth Proportional to 3,390.28, 5,081.82 and 1,309.72

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Solution

The fourth proportional to 3,390.28, 5,081.82 and 1,309.72 is: 1,963.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.28 : 5,081.82 = 1,309.72 : x
  2. Step 2: Convert to fraction form
    3,390.28/5,081.82 = 1,309.72/x
  3. Step 3: Cross multiply
    3,390.28x = 5,081.82 × 1,309.72
  4. Step 4: Simplify right side
    3,390.28x = 6,655,761.29
  5. Step 5: Solve for x
    x = 6,655,761.29/3,390.28
  6. Step 6: Final answer
    x = 1,963.19

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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.