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Finding the Fourth Proportional to 443.34, 664.07 and 211.89

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Solution

The fourth proportional to 443.34, 664.07 and 211.89 is: 317.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.34 : 664.07 = 211.89 : x
  2. Step 2: Convert to fraction form
    443.34/664.07 = 211.89/x
  3. Step 3: Cross multiply
    443.34x = 664.07 × 211.89
  4. Step 4: Simplify right side
    443.34x = 140,708.73
  5. Step 5: Solve for x
    x = 140,708.73/443.34
  6. Step 6: Final answer
    x = 317.38

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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.