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Finding the Fourth Proportional to 3,489.13, 4,815.03 and 1,917.28

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Solution

The fourth proportional to 3,489.13, 4,815.03 and 1,917.28 is: 2,645.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.13 : 4,815.03 = 1,917.28 : x
  2. Step 2: Convert to fraction form
    3,489.13/4,815.03 = 1,917.28/x
  3. Step 3: Cross multiply
    3,489.13x = 4,815.03 × 1,917.28
  4. Step 4: Simplify right side
    3,489.13x = 9,231,760.72
  5. Step 5: Solve for x
    x = 9,231,760.72/3,489.13
  6. Step 6: Final answer
    x = 2,645.86

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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.