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Finding the Fourth Proportional to 3,984.68, 5,499.69 and 2,728.28

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Solution

The fourth proportional to 3,984.68, 5,499.69 and 2,728.28 is: 3,765.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.68 : 5,499.69 = 2,728.28 : x
  2. Step 2: Convert to fraction form
    3,984.68/5,499.69 = 2,728.28/x
  3. Step 3: Cross multiply
    3,984.68x = 5,499.69 × 2,728.28
  4. Step 4: Simplify right side
    3,984.68x = 15,004,694.23
  5. Step 5: Solve for x
    x = 15,004,694.23/3,984.68
  6. Step 6: Final answer
    x = 3,765.60

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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.