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Finding the Fourth Proportional to 2,643.20, 3,964.80 and 2,604.80

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Solution

The fourth proportional to 2,643.20, 3,964.80 and 2,604.80 is: 3,907.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.20 : 3,964.80 = 2,604.80 : x
  2. Step 2: Convert to fraction form
    2,643.20/3,964.80 = 2,604.80/x
  3. Step 3: Cross multiply
    2,643.20x = 3,964.80 × 2,604.80
  4. Step 4: Simplify right side
    2,643.20x = 10,327,511.04
  5. Step 5: Solve for x
    x = 10,327,511.04/2,643.20
  6. Step 6: Final answer
    x = 3,907.20

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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.