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Finding the Fourth Proportional to 3,300.80, 4,977.04 and 2,891.20

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Solution

The fourth proportional to 3,300.80, 4,977.04 and 2,891.20 is: 4,359.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,300.80 : 4,977.04 = 2,891.20 : x
  2. Step 2: Convert to fraction form
    3,300.80/4,977.04 = 2,891.20/x
  3. Step 3: Cross multiply
    3,300.80x = 4,977.04 × 2,891.20
  4. Step 4: Simplify right side
    3,300.80x = 14,389,618.05
  5. Step 5: Solve for x
    x = 14,389,618.05/3,300.80
  6. Step 6: Final answer
    x = 4,359.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.