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Finding the Fourth Proportional to 275.01, 379.70 and 211.88

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Solution

The fourth proportional to 275.01, 379.70 and 211.88 is: 292.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.01 : 379.70 = 211.88 : x
  2. Step 2: Convert to fraction form
    275.01/379.70 = 211.88/x
  3. Step 3: Cross multiply
    275.01x = 379.70 × 211.88
  4. Step 4: Simplify right side
    275.01x = 80,450.84
  5. Step 5: Solve for x
    x = 80,450.84/275.01
  6. Step 6: Final answer
    x = 292.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.