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Finding the Fourth Proportional to 620.41, 930.84 and 255.22

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Solution

The fourth proportional to 620.41, 930.84 and 255.22 is: 382.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.41 : 930.84 = 255.22 : x
  2. Step 2: Convert to fraction form
    620.41/930.84 = 255.22/x
  3. Step 3: Cross multiply
    620.41x = 930.84 × 255.22
  4. Step 4: Simplify right side
    620.41x = 237,567.71
  5. Step 5: Solve for x
    x = 237,567.71/620.41
  6. Step 6: Final answer
    x = 382.92

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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.