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Finding the Fourth Proportional to 263.88, 394.92 and 209.34

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Solution

The fourth proportional to 263.88, 394.92 and 209.34 is: 313.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.88 : 394.92 = 209.34 : x
  2. Step 2: Convert to fraction form
    263.88/394.92 = 209.34/x
  3. Step 3: Cross multiply
    263.88x = 394.92 × 209.34
  4. Step 4: Simplify right side
    263.88x = 82,672.55
  5. Step 5: Solve for x
    x = 82,672.55/263.88
  6. Step 6: Final answer
    x = 313.30

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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.