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Finding the Fourth Proportional to 342.27, 513.09 and 213.75

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Solution

The fourth proportional to 342.27, 513.09 and 213.75 is: 320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.27 : 513.09 = 213.75 : x
  2. Step 2: Convert to fraction form
    342.27/513.09 = 213.75/x
  3. Step 3: Cross multiply
    342.27x = 513.09 × 213.75
  4. Step 4: Simplify right side
    342.27x = 109,672.99
  5. Step 5: Solve for x
    x = 109,672.99/342.27
  6. Step 6: Final answer
    x = 320.43

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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.