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Finding the Fourth Proportional to 371.86, 513.18 and 206.09

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Solution

The fourth proportional to 371.86, 513.18 and 206.09 is: 284.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.86 : 513.18 = 206.09 : x
  2. Step 2: Convert to fraction form
    371.86/513.18 = 206.09/x
  3. Step 3: Cross multiply
    371.86x = 513.18 × 206.09
  4. Step 4: Simplify right side
    371.86x = 105,761.27
  5. Step 5: Solve for x
    x = 105,761.27/371.86
  6. Step 6: Final answer
    x = 284.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.