Home / 3,398.96-4,689.20-2,139.60

Finding the Fourth Proportional to 3,398.96, 4,689.20 and 2,139.60

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Solution

The fourth proportional to 3,398.96, 4,689.20 and 2,139.60 is: 2,951.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.96 : 4,689.20 = 2,139.60 : x
  2. Step 2: Convert to fraction form
    3,398.96/4,689.20 = 2,139.60/x
  3. Step 3: Cross multiply
    3,398.96x = 4,689.20 × 2,139.60
  4. Step 4: Simplify right side
    3,398.96x = 10,033,012.32
  5. Step 5: Solve for x
    x = 10,033,012.32/3,398.96
  6. Step 6: Final answer
    x = 2,951.79

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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.