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Finding the Fourth Proportional to 281.65, 422.78 and 236.49

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Solution

The fourth proportional to 281.65, 422.78 and 236.49 is: 354.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.65 : 422.78 = 236.49 : x
  2. Step 2: Convert to fraction form
    281.65/422.78 = 236.49/x
  3. Step 3: Cross multiply
    281.65x = 422.78 × 236.49
  4. Step 4: Simplify right side
    281.65x = 99,982.06
  5. Step 5: Solve for x
    x = 99,982.06/281.65
  6. Step 6: Final answer
    x = 354.99

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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.