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Finding the Fourth Proportional to 3,980.74, 5,976.54 and 2,745.10

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Solution

The fourth proportional to 3,980.74, 5,976.54 and 2,745.10 is: 4,121.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.74 : 5,976.54 = 2,745.10 : x
  2. Step 2: Convert to fraction form
    3,980.74/5,976.54 = 2,745.10/x
  3. Step 3: Cross multiply
    3,980.74x = 5,976.54 × 2,745.10
  4. Step 4: Simplify right side
    3,980.74x = 16,406,199.95
  5. Step 5: Solve for x
    x = 16,406,199.95/3,980.74
  6. Step 6: Final answer
    x = 4,121.39

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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.