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Finding the Fourth Proportional to 620.22, 930.44 and 255.27

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Solution

The fourth proportional to 620.22, 930.44 and 255.27 is: 382.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.22 : 930.44 = 255.27 : x
  2. Step 2: Convert to fraction form
    620.22/930.44 = 255.27/x
  3. Step 3: Cross multiply
    620.22x = 930.44 × 255.27
  4. Step 4: Simplify right side
    620.22x = 237,514.06
  5. Step 5: Solve for x
    x = 237,514.06/620.22
  6. Step 6: Final answer
    x = 382.95

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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.