Home / 3,540.81-5,309.11-1,200.15

Finding the Fourth Proportional to 3,540.81, 5,309.11 and 1,200.15

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Solution

The fourth proportional to 3,540.81, 5,309.11 and 1,200.15 is: 1,799.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540.81 : 5,309.11 = 1,200.15 : x
  2. Step 2: Convert to fraction form
    3,540.81/5,309.11 = 1,200.15/x
  3. Step 3: Cross multiply
    3,540.81x = 5,309.11 × 1,200.15
  4. Step 4: Simplify right side
    3,540.81x = 6,371,729.87
  5. Step 5: Solve for x
    x = 6,371,729.87/3,540.81
  6. Step 6: Final answer
    x = 1,799.51

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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.