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Finding the Fourth Proportional to 343.14, 513.78 and 204.21

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Solution

The fourth proportional to 343.14, 513.78 and 204.21 is: 305.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.14 : 513.78 = 204.21 : x
  2. Step 2: Convert to fraction form
    343.14/513.78 = 204.21/x
  3. Step 3: Cross multiply
    343.14x = 513.78 × 204.21
  4. Step 4: Simplify right side
    343.14x = 104,919.01
  5. Step 5: Solve for x
    x = 104,919.01/343.14
  6. Step 6: Final answer
    x = 305.76

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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.