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Finding the Fourth Proportional to 3,899.71, 5,388.48 and 2,889.97

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Solution

The fourth proportional to 3,899.71, 5,388.48 and 2,889.97 is: 3,993.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.71 : 5,388.48 = 2,889.97 : x
  2. Step 2: Convert to fraction form
    3,899.71/5,388.48 = 2,889.97/x
  3. Step 3: Cross multiply
    3,899.71x = 5,388.48 × 2,889.97
  4. Step 4: Simplify right side
    3,899.71x = 15,572,504.15
  5. Step 5: Solve for x
    x = 15,572,504.15/3,899.71
  6. Step 6: Final answer
    x = 3,993.25

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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.