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Finding the Fourth Proportional to 281.76, 422.16 and 151.75

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Solution

The fourth proportional to 281.76, 422.16 and 151.75 is: 227.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.76 : 422.16 = 151.75 : x
  2. Step 2: Convert to fraction form
    281.76/422.16 = 151.75/x
  3. Step 3: Cross multiply
    281.76x = 422.16 × 151.75
  4. Step 4: Simplify right side
    281.76x = 64,062.78
  5. Step 5: Solve for x
    x = 64,062.78/281.76
  6. Step 6: Final answer
    x = 227.37

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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.