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Finding the Fourth Proportional to 2,224.75, 3,335.13 and 1,128.55

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Solution

The fourth proportional to 2,224.75, 3,335.13 and 1,128.55 is: 1,691.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,224.75 : 3,335.13 = 1,128.55 : x
  2. Step 2: Convert to fraction form
    2,224.75/3,335.13 = 1,128.55/x
  3. Step 3: Cross multiply
    2,224.75x = 3,335.13 × 1,128.55
  4. Step 4: Simplify right side
    2,224.75x = 3,763,860.96
  5. Step 5: Solve for x
    x = 3,763,860.96/2,224.75
  6. Step 6: Final answer
    x = 1,691.81

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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.