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Finding the Fourth Proportional to 863.22, 1,293.39 and 618.51

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Solution

The fourth proportional to 863.22, 1,293.39 and 618.51 is: 926.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.22 : 1,293.39 = 618.51 : x
  2. Step 2: Convert to fraction form
    863.22/1,293.39 = 618.51/x
  3. Step 3: Cross multiply
    863.22x = 1,293.39 × 618.51
  4. Step 4: Simplify right side
    863.22x = 799,974.65
  5. Step 5: Solve for x
    x = 799,974.65/863.22
  6. Step 6: Final answer
    x = 926.73

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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.