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Finding the Fourth Proportional to 343.59, 515.39 and 213.97

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Solution

The fourth proportional to 343.59, 515.39 and 213.97 is: 320.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.59 : 515.39 = 213.97 : x
  2. Step 2: Convert to fraction form
    343.59/515.39 = 213.97/x
  3. Step 3: Cross multiply
    343.59x = 515.39 × 213.97
  4. Step 4: Simplify right side
    343.59x = 110,278.00
  5. Step 5: Solve for x
    x = 110,278.00/343.59
  6. Step 6: Final answer
    x = 320.96

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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.