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Finding the Fourth Proportional to 281.79, 422.28 and 159.75

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Solution

The fourth proportional to 281.79, 422.28 and 159.75 is: 239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.79 : 422.28 = 159.75 : x
  2. Step 2: Convert to fraction form
    281.79/422.28 = 159.75/x
  3. Step 3: Cross multiply
    281.79x = 422.28 × 159.75
  4. Step 4: Simplify right side
    281.79x = 67,459.23
  5. Step 5: Solve for x
    x = 67,459.23/281.79
  6. Step 6: Final answer
    x = 239.40

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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.