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Finding the Fourth Proportional to 3,886.64, 5,363.36 and 2,207.82

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Solution

The fourth proportional to 3,886.64, 5,363.36 and 2,207.82 is: 3,046.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.64 : 5,363.36 = 2,207.82 : x
  2. Step 2: Convert to fraction form
    3,886.64/5,363.36 = 2,207.82/x
  3. Step 3: Cross multiply
    3,886.64x = 5,363.36 × 2,207.82
  4. Step 4: Simplify right side
    3,886.64x = 11,841,338.99
  5. Step 5: Solve for x
    x = 11,841,338.99/3,886.64
  6. Step 6: Final answer
    x = 3,046.68

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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.