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Finding the Fourth Proportional to 443.04, 664.65 and 211.95

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Solution

The fourth proportional to 443.04, 664.65 and 211.95 is: 317.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.04 : 664.65 = 211.95 : x
  2. Step 2: Convert to fraction form
    443.04/664.65 = 211.95/x
  3. Step 3: Cross multiply
    443.04x = 664.65 × 211.95
  4. Step 4: Simplify right side
    443.04x = 140,872.57
  5. Step 5: Solve for x
    x = 140,872.57/443.04
  6. Step 6: Final answer
    x = 317.97

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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.