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Finding the Fourth Proportional to 464.72, 697.20 and 221.12

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Solution

The fourth proportional to 464.72, 697.20 and 221.12 is: 331.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.72 : 697.20 = 221.12 : x
  2. Step 2: Convert to fraction form
    464.72/697.20 = 221.12/x
  3. Step 3: Cross multiply
    464.72x = 697.20 × 221.12
  4. Step 4: Simplify right side
    464.72x = 154,164.86
  5. Step 5: Solve for x
    x = 154,164.86/464.72
  6. Step 6: Final answer
    x = 331.74

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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.