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Finding the Fourth Proportional to 281.75, 422.26 and 209.03

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Solution

The fourth proportional to 281.75, 422.26 and 209.03 is: 313.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.75 : 422.26 = 209.03 : x
  2. Step 2: Convert to fraction form
    281.75/422.26 = 209.03/x
  3. Step 3: Cross multiply
    281.75x = 422.26 × 209.03
  4. Step 4: Simplify right side
    281.75x = 88,265.01
  5. Step 5: Solve for x
    x = 88,265.01/281.75
  6. Step 6: Final answer
    x = 313.27

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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.