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Finding the Fourth Proportional to 3,954.38, 5,457 and 2,186.02

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Solution

The fourth proportional to 3,954.38, 5,457 and 2,186.02 is: 3,016.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,954.38 : 5,457 = 2,186.02 : x
  2. Step 2: Convert to fraction form
    3,954.38/5,457 = 2,186.02/x
  3. Step 3: Cross multiply
    3,954.38x = 5,457 × 2,186.02
  4. Step 4: Simplify right side
    3,954.38x = 11,929,111.14
  5. Step 5: Solve for x
    x = 11,929,111.14/3,954.38
  6. Step 6: Final answer
    x = 3,016.68

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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.