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Finding the Fourth Proportional to 1,906.67, 2,629.46 and 1,243.28

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Solution

The fourth proportional to 1,906.67, 2,629.46 and 1,243.28 is: 1,714.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.67 : 2,629.46 = 1,243.28 : x
  2. Step 2: Convert to fraction form
    1,906.67/2,629.46 = 1,243.28/x
  3. Step 3: Cross multiply
    1,906.67x = 2,629.46 × 1,243.28
  4. Step 4: Simplify right side
    1,906.67x = 3,269,148.81
  5. Step 5: Solve for x
    x = 3,269,148.81/1,906.67
  6. Step 6: Final answer
    x = 1,714.59

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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.