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Finding the Fourth Proportional to 281.60, 422.43 and 166.22

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Solution

The fourth proportional to 281.60, 422.43 and 166.22 is: 249.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.60 : 422.43 = 166.22 : x
  2. Step 2: Convert to fraction form
    281.60/422.43 = 166.22/x
  3. Step 3: Cross multiply
    281.60x = 422.43 × 166.22
  4. Step 4: Simplify right side
    281.60x = 70,216.31
  5. Step 5: Solve for x
    x = 70,216.31/281.60
  6. Step 6: Final answer
    x = 249.35

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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.