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Finding the Fourth Proportional to 1,395.22, 2,093.40 and 745.78

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Solution

The fourth proportional to 1,395.22, 2,093.40 and 745.78 is: 1,118.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.22 : 2,093.40 = 745.78 : x
  2. Step 2: Convert to fraction form
    1,395.22/2,093.40 = 745.78/x
  3. Step 3: Cross multiply
    1,395.22x = 2,093.40 × 745.78
  4. Step 4: Simplify right side
    1,395.22x = 1,561,215.85
  5. Step 5: Solve for x
    x = 1,561,215.85/1,395.22
  6. Step 6: Final answer
    x = 1,118.97

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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.