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Finding the Fourth Proportional to 2,205.84, 3,309.30 and 725.04

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Solution

The fourth proportional to 2,205.84, 3,309.30 and 725.04 is: 1,087.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.84 : 3,309.30 = 725.04 : x
  2. Step 2: Convert to fraction form
    2,205.84/3,309.30 = 725.04/x
  3. Step 3: Cross multiply
    2,205.84x = 3,309.30 × 725.04
  4. Step 4: Simplify right side
    2,205.84x = 2,399,374.87
  5. Step 5: Solve for x
    x = 2,399,374.87/2,205.84
  6. Step 6: Final answer
    x = 1,087.74

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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.