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Finding the Fourth Proportional to 1,269.44, 1,751.36 and 745.28

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Solution

The fourth proportional to 1,269.44, 1,751.36 and 745.28 is: 1,028.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.44 : 1,751.36 = 745.28 : x
  2. Step 2: Convert to fraction form
    1,269.44/1,751.36 = 745.28/x
  3. Step 3: Cross multiply
    1,269.44x = 1,751.36 × 745.28
  4. Step 4: Simplify right side
    1,269.44x = 1,305,253.58
  5. Step 5: Solve for x
    x = 1,305,253.58/1,269.44
  6. Step 6: Final answer
    x = 1,028.21

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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.