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Finding the Fourth Proportional to 281.08, 420.99 and 222.94

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Solution

The fourth proportional to 281.08, 420.99 and 222.94 is: 333.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.08 : 420.99 = 222.94 : x
  2. Step 2: Convert to fraction form
    281.08/420.99 = 222.94/x
  3. Step 3: Cross multiply
    281.08x = 420.99 × 222.94
  4. Step 4: Simplify right side
    281.08x = 93,855.51
  5. Step 5: Solve for x
    x = 93,855.51/281.08
  6. Step 6: Final answer
    x = 333.91

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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.