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Finding the Fourth Proportional to 3,863, 5,331.66 and 2,207

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Solution

The fourth proportional to 3,863, 5,331.66 and 2,207 is: 3,046.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,863 : 5,331.66 = 2,207 : x
  2. Step 2: Convert to fraction form
    3,863/5,331.66 = 2,207/x
  3. Step 3: Cross multiply
    3,863x = 5,331.66 × 2,207
  4. Step 4: Simplify right side
    3,863x = 11,766,973.62
  5. Step 5: Solve for x
    x = 11,766,973.62/3,863
  6. Step 6: Final answer
    x = 3,046.07

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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.