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Finding the Fourth Proportional to 3,912.60, 5,389.02 and 2,914.68

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Solution

The fourth proportional to 3,912.60, 5,389.02 and 2,914.68 is: 4,014.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.60 : 5,389.02 = 2,914.68 : x
  2. Step 2: Convert to fraction form
    3,912.60/5,389.02 = 2,914.68/x
  3. Step 3: Cross multiply
    3,912.60x = 5,389.02 × 2,914.68
  4. Step 4: Simplify right side
    3,912.60x = 15,707,268.81
  5. Step 5: Solve for x
    x = 15,707,268.81/3,912.60
  6. Step 6: Final answer
    x = 4,014.53

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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.