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Finding the Fourth Proportional to 511.41, 767.21 and 338.22

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Solution

The fourth proportional to 511.41, 767.21 and 338.22 is: 507.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.41 : 767.21 = 338.22 : x
  2. Step 2: Convert to fraction form
    511.41/767.21 = 338.22/x
  3. Step 3: Cross multiply
    511.41x = 767.21 × 338.22
  4. Step 4: Simplify right side
    511.41x = 259,485.77
  5. Step 5: Solve for x
    x = 259,485.77/511.41
  6. Step 6: Final answer
    x = 507.39

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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.