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Finding the Fourth Proportional to 3,389.88, 5,080.47 and 2,949.30

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Solution

The fourth proportional to 3,389.88, 5,080.47 and 2,949.30 is: 4,420.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.88 : 5,080.47 = 2,949.30 : x
  2. Step 2: Convert to fraction form
    3,389.88/5,080.47 = 2,949.30/x
  3. Step 3: Cross multiply
    3,389.88x = 5,080.47 × 2,949.30
  4. Step 4: Simplify right side
    3,389.88x = 14,983,830.17
  5. Step 5: Solve for x
    x = 14,983,830.17/3,389.88
  6. Step 6: Final answer
    x = 4,420.17

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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.