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Finding the Fourth Proportional to 3,889.98, 5,366.07 and 3,213.79

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Solution

The fourth proportional to 3,889.98, 5,366.07 and 3,213.79 is: 4,433.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.98 : 5,366.07 = 3,213.79 : x
  2. Step 2: Convert to fraction form
    3,889.98/5,366.07 = 3,213.79/x
  3. Step 3: Cross multiply
    3,889.98x = 5,366.07 × 3,213.79
  4. Step 4: Simplify right side
    3,889.98x = 17,245,425.27
  5. Step 5: Solve for x
    x = 17,245,425.27/3,889.98
  6. Step 6: Final answer
    x = 4,433.29

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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.