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Finding the Fourth Proportional to 380.67, 571.16 and 198.19

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Solution

The fourth proportional to 380.67, 571.16 and 198.19 is: 297.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.67 : 571.16 = 198.19 : x
  2. Step 2: Convert to fraction form
    380.67/571.16 = 198.19/x
  3. Step 3: Cross multiply
    380.67x = 571.16 × 198.19
  4. Step 4: Simplify right side
    380.67x = 113,197.21
  5. Step 5: Solve for x
    x = 113,197.21/380.67
  6. Step 6: Final answer
    x = 297.37

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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.