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Finding the Fourth Proportional to 343.11, 514.32 and 221.46

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Solution

The fourth proportional to 343.11, 514.32 and 221.46 is: 331.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.11 : 514.32 = 221.46 : x
  2. Step 2: Convert to fraction form
    343.11/514.32 = 221.46/x
  3. Step 3: Cross multiply
    343.11x = 514.32 × 221.46
  4. Step 4: Simplify right side
    343.11x = 113,898.74
  5. Step 5: Solve for x
    x = 113,898.74/343.11
  6. Step 6: Final answer
    x = 331.96

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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.