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Finding the Fourth Proportional to 519.41, 779.19 and 211.19

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Solution

The fourth proportional to 519.41, 779.19 and 211.19 is: 316.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.41 : 779.19 = 211.19 : x
  2. Step 2: Convert to fraction form
    519.41/779.19 = 211.19/x
  3. Step 3: Cross multiply
    519.41x = 779.19 × 211.19
  4. Step 4: Simplify right side
    519.41x = 164,557.14
  5. Step 5: Solve for x
    x = 164,557.14/519.41
  6. Step 6: Final answer
    x = 316.82

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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.