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Finding the Fourth Proportional to 2,170.53, 3,255.36 and 610.61

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Solution

The fourth proportional to 2,170.53, 3,255.36 and 610.61 is: 915.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.53 : 3,255.36 = 610.61 : x
  2. Step 2: Convert to fraction form
    2,170.53/3,255.36 = 610.61/x
  3. Step 3: Cross multiply
    2,170.53x = 3,255.36 × 610.61
  4. Step 4: Simplify right side
    2,170.53x = 1,987,736.80
  5. Step 5: Solve for x
    x = 1,987,736.80/2,170.53
  6. Step 6: Final answer
    x = 915.78

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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.