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Finding the Fourth Proportional to 4,479, 6,720.12 and 4,119.36

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Solution

The fourth proportional to 4,479, 6,720.12 and 4,119.36 is: 6,180.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,479 : 6,720.12 = 4,119.36 : x
  2. Step 2: Convert to fraction form
    4,479/6,720.12 = 4,119.36/x
  3. Step 3: Cross multiply
    4,479x = 6,720.12 × 4,119.36
  4. Step 4: Simplify right side
    4,479x = 27,682,593.52
  5. Step 5: Solve for x
    x = 27,682,593.52/4,479
  6. Step 6: Final answer
    x = 6,180.53

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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.