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Finding the Fourth Proportional to 742.22, 1,025.22 and 677.82

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Solution

The fourth proportional to 742.22, 1,025.22 and 677.82 is: 936.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.22 : 1,025.22 = 677.82 : x
  2. Step 2: Convert to fraction form
    742.22/1,025.22 = 677.82/x
  3. Step 3: Cross multiply
    742.22x = 1,025.22 × 677.82
  4. Step 4: Simplify right side
    742.22x = 694,914.62
  5. Step 5: Solve for x
    x = 694,914.62/742.22
  6. Step 6: Final answer
    x = 936.27

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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.