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Finding the Fourth Proportional to 282.27, 422.90 and 281.25

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Solution

The fourth proportional to 282.27, 422.90 and 281.25 is: 421.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.27 : 422.90 = 281.25 : x
  2. Step 2: Convert to fraction form
    282.27/422.90 = 281.25/x
  3. Step 3: Cross multiply
    282.27x = 422.90 × 281.25
  4. Step 4: Simplify right side
    282.27x = 118,938.29
  5. Step 5: Solve for x
    x = 118,938.29/282.27
  6. Step 6: Final answer
    x = 421.36

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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.