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Finding the Fourth Proportional to 3,980.05, 5,979.26 and 2,503.87

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Solution

The fourth proportional to 3,980.05, 5,979.26 and 2,503.87 is: 3,761.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.05 : 5,979.26 = 2,503.87 : x
  2. Step 2: Convert to fraction form
    3,980.05/5,979.26 = 2,503.87/x
  3. Step 3: Cross multiply
    3,980.05x = 5,979.26 × 2,503.87
  4. Step 4: Simplify right side
    3,980.05x = 14,971,289.74
  5. Step 5: Solve for x
    x = 14,971,289.74/3,980.05
  6. Step 6: Final answer
    x = 3,761.58

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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.