Home / 2,108.40-3,161.82-1,231.20

Finding the Fourth Proportional to 2,108.40, 3,161.82 and 1,231.20

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Solution

The fourth proportional to 2,108.40, 3,161.82 and 1,231.20 is: 1,846.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.40 : 3,161.82 = 1,231.20 : x
  2. Step 2: Convert to fraction form
    2,108.40/3,161.82 = 1,231.20/x
  3. Step 3: Cross multiply
    2,108.40x = 3,161.82 × 1,231.20
  4. Step 4: Simplify right side
    2,108.40x = 3,892,832.78
  5. Step 5: Solve for x
    x = 3,892,832.78/2,108.40
  6. Step 6: Final answer
    x = 1,846.34

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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.