Home / 3,102.20-4,279.82-2,108.28

Finding the Fourth Proportional to 3,102.20, 4,279.82 and 2,108.28

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Solution

The fourth proportional to 3,102.20, 4,279.82 and 2,108.28 is: 2,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,102.20 : 4,279.82 = 2,108.28 : x
  2. Step 2: Convert to fraction form
    3,102.20/4,279.82 = 2,108.28/x
  3. Step 3: Cross multiply
    3,102.20x = 4,279.82 × 2,108.28
  4. Step 4: Simplify right side
    3,102.20x = 9,023,058.91
  5. Step 5: Solve for x
    x = 9,023,058.91/3,102.20
  6. Step 6: Final answer
    x = 2,908.60

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1.5x scale

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.