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Finding the Fourth Proportional to 3,390.76, 4,679.72 and 2,449.60

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Solution

The fourth proportional to 3,390.76, 4,679.72 and 2,449.60 is: 3,380.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.76 : 4,679.72 = 2,449.60 : x
  2. Step 2: Convert to fraction form
    3,390.76/4,679.72 = 2,449.60/x
  3. Step 3: Cross multiply
    3,390.76x = 4,679.72 × 2,449.60
  4. Step 4: Simplify right side
    3,390.76x = 11,463,441.13
  5. Step 5: Solve for x
    x = 11,463,441.13/3,390.76
  6. Step 6: Final answer
    x = 3,380.79

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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.