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Finding the Fourth Proportional to 3,959.88, 5,926.92 and 2,919.48

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Solution

The fourth proportional to 3,959.88, 5,926.92 and 2,919.48 is: 4,369.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.88 : 5,926.92 = 2,919.48 : x
  2. Step 2: Convert to fraction form
    3,959.88/5,926.92 = 2,919.48/x
  3. Step 3: Cross multiply
    3,959.88x = 5,926.92 × 2,919.48
  4. Step 4: Simplify right side
    3,959.88x = 17,303,524.40
  5. Step 5: Solve for x
    x = 17,303,524.40/3,959.88
  6. Step 6: Final answer
    x = 4,369.71

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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.