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Finding the Fourth Proportional to 464.69, 697.11 and 221.09

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Solution

The fourth proportional to 464.69, 697.11 and 221.09 is: 331.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.69 : 697.11 = 221.09 : x
  2. Step 2: Convert to fraction form
    464.69/697.11 = 221.09/x
  3. Step 3: Cross multiply
    464.69x = 697.11 × 221.09
  4. Step 4: Simplify right side
    464.69x = 154,120.56
  5. Step 5: Solve for x
    x = 154,120.56/464.69
  6. Step 6: Final answer
    x = 331.66

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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.