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Finding the Fourth Proportional to 3,980.79, 5,967.99 and 2,005.34

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Solution

The fourth proportional to 3,980.79, 5,967.99 and 2,005.34 is: 3,006.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.79 : 5,967.99 = 2,005.34 : x
  2. Step 2: Convert to fraction form
    3,980.79/5,967.99 = 2,005.34/x
  3. Step 3: Cross multiply
    3,980.79x = 5,967.99 × 2,005.34
  4. Step 4: Simplify right side
    3,980.79x = 11,967,819.23
  5. Step 5: Solve for x
    x = 11,967,819.23/3,980.79
  6. Step 6: Final answer
    x = 3,006.39

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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.