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Finding the Fourth Proportional to 3,728.95, 5,581.43 and 1,971.48

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Solution

The fourth proportional to 3,728.95, 5,581.43 and 1,971.48 is: 2,950.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.95 : 5,581.43 = 1,971.48 : x
  2. Step 2: Convert to fraction form
    3,728.95/5,581.43 = 1,971.48/x
  3. Step 3: Cross multiply
    3,728.95x = 5,581.43 × 1,971.48
  4. Step 4: Simplify right side
    3,728.95x = 11,003,677.62
  5. Step 5: Solve for x
    x = 11,003,677.62/3,728.95
  6. Step 6: Final answer
    x = 2,950.88

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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.