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Finding the Fourth Proportional to 445.22, 666.89 and 282.09

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Solution

The fourth proportional to 445.22, 666.89 and 282.09 is: 422.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.22 : 666.89 = 282.09 : x
  2. Step 2: Convert to fraction form
    445.22/666.89 = 282.09/x
  3. Step 3: Cross multiply
    445.22x = 666.89 × 282.09
  4. Step 4: Simplify right side
    445.22x = 188,123.00
  5. Step 5: Solve for x
    x = 188,123.00/445.22
  6. Step 6: Final answer
    x = 422.54

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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.