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Finding the Fourth Proportional to 725.41, 1,087.15 and 379.04

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Solution

The fourth proportional to 725.41, 1,087.15 and 379.04 is: 568.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.41 : 1,087.15 = 379.04 : x
  2. Step 2: Convert to fraction form
    725.41/1,087.15 = 379.04/x
  3. Step 3: Cross multiply
    725.41x = 1,087.15 × 379.04
  4. Step 4: Simplify right side
    725.41x = 412,066.95
  5. Step 5: Solve for x
    x = 412,066.95/725.41
  6. Step 6: Final answer
    x = 568.05

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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.