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Finding the Fourth Proportional to 343.26, 516.63 and 309.72

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Solution

The fourth proportional to 343.26, 516.63 and 309.72 is: 466.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.26 : 516.63 = 309.72 : x
  2. Step 2: Convert to fraction form
    343.26/516.63 = 309.72/x
  3. Step 3: Cross multiply
    343.26x = 516.63 × 309.72
  4. Step 4: Simplify right side
    343.26x = 160,010.64
  5. Step 5: Solve for x
    x = 160,010.64/343.26
  6. Step 6: Final answer
    x = 466.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.