Home / 3,398.20-4,689.74-1,906.22

Finding the Fourth Proportional to 3,398.20, 4,689.74 and 1,906.22

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Solution

The fourth proportional to 3,398.20, 4,689.74 and 1,906.22 is: 2,630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.20 : 4,689.74 = 1,906.22 : x
  2. Step 2: Convert to fraction form
    3,398.20/4,689.74 = 1,906.22/x
  3. Step 3: Cross multiply
    3,398.20x = 4,689.74 × 1,906.22
  4. Step 4: Simplify right side
    3,398.20x = 8,939,676.18
  5. Step 5: Solve for x
    x = 8,939,676.18/3,398.20
  6. Step 6: Final answer
    x = 2,630.71

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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.