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Finding the Fourth Proportional to 3,381.12, 5,068.22 and 1,917.18

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Solution

The fourth proportional to 3,381.12, 5,068.22 and 1,917.18 is: 2,873.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.12 : 5,068.22 = 1,917.18 : x
  2. Step 2: Convert to fraction form
    3,381.12/5,068.22 = 1,917.18/x
  3. Step 3: Cross multiply
    3,381.12x = 5,068.22 × 1,917.18
  4. Step 4: Simplify right side
    3,381.12x = 9,716,680.43
  5. Step 5: Solve for x
    x = 9,716,680.43/3,381.12
  6. Step 6: Final answer
    x = 2,873.81

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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.