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Finding the Fourth Proportional to 3,390.81, 5,082.11 and 1,540.06

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Solution

The fourth proportional to 3,390.81, 5,082.11 and 1,540.06 is: 2,308.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.81 : 5,082.11 = 1,540.06 : x
  2. Step 2: Convert to fraction form
    3,390.81/5,082.11 = 1,540.06/x
  3. Step 3: Cross multiply
    3,390.81x = 5,082.11 × 1,540.06
  4. Step 4: Simplify right side
    3,390.81x = 7,826,739.70
  5. Step 5: Solve for x
    x = 7,826,739.70/3,390.81
  6. Step 6: Final answer
    x = 2,308.22

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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.