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Finding the Fourth Proportional to 3,971.43, 5,957.28 and 3,390.66

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Solution

The fourth proportional to 3,971.43, 5,957.28 and 3,390.66 is: 5,086.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.43 : 5,957.28 = 3,390.66 : x
  2. Step 2: Convert to fraction form
    3,971.43/5,957.28 = 3,390.66/x
  3. Step 3: Cross multiply
    3,971.43x = 5,957.28 × 3,390.66
  4. Step 4: Simplify right side
    3,971.43x = 20,199,111.00
  5. Step 5: Solve for x
    x = 20,199,111.00/3,971.43
  6. Step 6: Final answer
    x = 5,086.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.