Home / 3,398.89-4,690.68-1,906.90

Finding the Fourth Proportional to 3,398.89, 4,690.68 and 1,906.90

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Solution

The fourth proportional to 3,398.89, 4,690.68 and 1,906.90 is: 2,631.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.89 : 4,690.68 = 1,906.90 : x
  2. Step 2: Convert to fraction form
    3,398.89/4,690.68 = 1,906.90/x
  3. Step 3: Cross multiply
    3,398.89x = 4,690.68 × 1,906.90
  4. Step 4: Simplify right side
    3,398.89x = 8,944,687.89
  5. Step 5: Solve for x
    x = 8,944,687.89/3,398.89
  6. Step 6: Final answer
    x = 2,631.65

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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.