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Finding the Fourth Proportional to 3,617.75, 4,992.50 and 1,961.75

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Solution

The fourth proportional to 3,617.75, 4,992.50 and 1,961.75 is: 2,707.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,617.75 : 4,992.50 = 1,961.75 : x
  2. Step 2: Convert to fraction form
    3,617.75/4,992.50 = 1,961.75/x
  3. Step 3: Cross multiply
    3,617.75x = 4,992.50 × 1,961.75
  4. Step 4: Simplify right side
    3,617.75x = 9,794,036.88
  5. Step 5: Solve for x
    x = 9,794,036.88/3,617.75
  6. Step 6: Final answer
    x = 2,707.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.