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Finding the Fourth Proportional to 7,268.80, 10,903.20 and 3,380.80

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Solution

The fourth proportional to 7,268.80, 10,903.20 and 3,380.80 is: 5,071.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,268.80 : 10,903.20 = 3,380.80 : x
  2. Step 2: Convert to fraction form
    7,268.80/10,903.20 = 3,380.80/x
  3. Step 3: Cross multiply
    7,268.80x = 10,903.20 × 3,380.80
  4. Step 4: Simplify right side
    7,268.80x = 36,861,538.56
  5. Step 5: Solve for x
    x = 36,861,538.56/7,268.80
  6. Step 6: Final answer
    x = 5,071.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.