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Finding the Fourth Proportional to 343.72, 516.17 and 189.96

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Solution

The fourth proportional to 343.72, 516.17 and 189.96 is: 285.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.72 : 516.17 = 189.96 : x
  2. Step 2: Convert to fraction form
    343.72/516.17 = 189.96/x
  3. Step 3: Cross multiply
    343.72x = 516.17 × 189.96
  4. Step 4: Simplify right side
    343.72x = 98,051.65
  5. Step 5: Solve for x
    x = 98,051.65/343.72
  6. Step 6: Final answer
    x = 285.27

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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.