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Finding the Fourth Proportional to 1,268.25, 1,749.97 and 744.38

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Solution

The fourth proportional to 1,268.25, 1,749.97 and 744.38 is: 1,027.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.25 : 1,749.97 = 744.38 : x
  2. Step 2: Convert to fraction form
    1,268.25/1,749.97 = 744.38/x
  3. Step 3: Cross multiply
    1,268.25x = 1,749.97 × 744.38
  4. Step 4: Simplify right side
    1,268.25x = 1,302,642.67
  5. Step 5: Solve for x
    x = 1,302,642.67/1,268.25
  6. Step 6: Final answer
    x = 1,027.12

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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.