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Finding the Fourth Proportional to 343.71, 515.94 and 198

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Solution

The fourth proportional to 343.71, 515.94 and 198 is: 297.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.71 : 515.94 = 198 : x
  2. Step 2: Convert to fraction form
    343.71/515.94 = 198/x
  3. Step 3: Cross multiply
    343.71x = 515.94 × 198
  4. Step 4: Simplify right side
    343.71x = 102,156.12
  5. Step 5: Solve for x
    x = 102,156.12/343.71
  6. Step 6: Final answer
    x = 297.22

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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.