Home / 3,109.20-4,287.96-2,438.88

Finding the Fourth Proportional to 3,109.20, 4,287.96 and 2,438.88

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Solution

The fourth proportional to 3,109.20, 4,287.96 and 2,438.88 is: 3,363.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.20 : 4,287.96 = 2,438.88 : x
  2. Step 2: Convert to fraction form
    3,109.20/4,287.96 = 2,438.88/x
  3. Step 3: Cross multiply
    3,109.20x = 4,287.96 × 2,438.88
  4. Step 4: Simplify right side
    3,109.20x = 10,457,819.88
  5. Step 5: Solve for x
    x = 10,457,819.88/3,109.20
  6. Step 6: Final answer
    x = 3,363.51

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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.