Home / 2,108.13-3,161.15-1,328.75

Finding the Fourth Proportional to 2,108.13, 3,161.15 and 1,328.75

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Solution

The fourth proportional to 2,108.13, 3,161.15 and 1,328.75 is: 1,992.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.13 : 3,161.15 = 1,328.75 : x
  2. Step 2: Convert to fraction form
    2,108.13/3,161.15 = 1,328.75/x
  3. Step 3: Cross multiply
    2,108.13x = 3,161.15 × 1,328.75
  4. Step 4: Simplify right side
    2,108.13x = 4,200,393.97
  5. Step 5: Solve for x
    x = 4,200,393.97/2,108.13
  6. Step 6: Final answer
    x = 1,992.48

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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.