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Finding the Fourth Proportional to 281.88, 422.82 and 190.35

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Solution

The fourth proportional to 281.88, 422.82 and 190.35 is: 285.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.88 : 422.82 = 190.35 : x
  2. Step 2: Convert to fraction form
    281.88/422.82 = 190.35/x
  3. Step 3: Cross multiply
    281.88x = 422.82 × 190.35
  4. Step 4: Simplify right side
    281.88x = 80,483.79
  5. Step 5: Solve for x
    x = 80,483.79/281.88
  6. Step 6: Final answer
    x = 285.53

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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.