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Finding the Fourth Proportional to 281.86, 422.45 and 159.95

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Solution

The fourth proportional to 281.86, 422.45 and 159.95 is: 239.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.86 : 422.45 = 159.95 : x
  2. Step 2: Convert to fraction form
    281.86/422.45 = 159.95/x
  3. Step 3: Cross multiply
    281.86x = 422.45 × 159.95
  4. Step 4: Simplify right side
    281.86x = 67,570.08
  5. Step 5: Solve for x
    x = 67,570.08/281.86
  6. Step 6: Final answer
    x = 239.73

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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.