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Finding the Fourth Proportional to 3,957, 5,460.68 and 2,188.64

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Solution

The fourth proportional to 3,957, 5,460.68 and 2,188.64 is: 3,020.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,957 : 5,460.68 = 2,188.64 : x
  2. Step 2: Convert to fraction form
    3,957/5,460.68 = 2,188.64/x
  3. Step 3: Cross multiply
    3,957x = 5,460.68 × 2,188.64
  4. Step 4: Simplify right side
    3,957x = 11,951,462.68
  5. Step 5: Solve for x
    x = 11,951,462.68/3,957
  6. Step 6: Final answer
    x = 3,020.33

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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.