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Finding the Fourth Proportional to 1,958.70, 2,700.81 and 1,249.41

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Solution

The fourth proportional to 1,958.70, 2,700.81 and 1,249.41 is: 1,722.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.70 : 2,700.81 = 1,249.41 : x
  2. Step 2: Convert to fraction form
    1,958.70/2,700.81 = 1,249.41/x
  3. Step 3: Cross multiply
    1,958.70x = 2,700.81 × 1,249.41
  4. Step 4: Simplify right side
    1,958.70x = 3,374,419.02
  5. Step 5: Solve for x
    x = 3,374,419.02/1,958.70
  6. Step 6: Final answer
    x = 1,722.79

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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.