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Finding the Fourth Proportional to 471.38, 706.95 and 211.23

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Solution

The fourth proportional to 471.38, 706.95 and 211.23 is: 316.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.38 : 706.95 = 211.23 : x
  2. Step 2: Convert to fraction form
    471.38/706.95 = 211.23/x
  3. Step 3: Cross multiply
    471.38x = 706.95 × 211.23
  4. Step 4: Simplify right side
    471.38x = 149,329.05
  5. Step 5: Solve for x
    x = 149,329.05/471.38
  6. Step 6: Final answer
    x = 316.79

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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.