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Finding the Fourth Proportional to 281.22, 388.23 and 170.72

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Solution

The fourth proportional to 281.22, 388.23 and 170.72 is: 235.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.22 : 388.23 = 170.72 : x
  2. Step 2: Convert to fraction form
    281.22/388.23 = 170.72/x
  3. Step 3: Cross multiply
    281.22x = 388.23 × 170.72
  4. Step 4: Simplify right side
    281.22x = 66,278.63
  5. Step 5: Solve for x
    x = 66,278.63/281.22
  6. Step 6: Final answer
    x = 235.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.