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Finding the Fourth Proportional to 4,889.20, 6,742.72 and 3,839.44

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Solution

The fourth proportional to 4,889.20, 6,742.72 and 3,839.44 is: 5,294.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,889.20 : 6,742.72 = 3,839.44 : x
  2. Step 2: Convert to fraction form
    4,889.20/6,742.72 = 3,839.44/x
  3. Step 3: Cross multiply
    4,889.20x = 6,742.72 × 3,839.44
  4. Step 4: Simplify right side
    4,889.20x = 25,888,268.88
  5. Step 5: Solve for x
    x = 25,888,268.88/4,889.20
  6. Step 6: Final answer
    x = 5,294.99

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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.