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Finding the Fourth Proportional to 275.42, 379.89 and 213.23

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Solution

The fourth proportional to 275.42, 379.89 and 213.23 is: 294.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.42 : 379.89 = 213.23 : x
  2. Step 2: Convert to fraction form
    275.42/379.89 = 213.23/x
  3. Step 3: Cross multiply
    275.42x = 379.89 × 213.23
  4. Step 4: Simplify right side
    275.42x = 81,004.89
  5. Step 5: Solve for x
    x = 81,004.89/275.42
  6. Step 6: Final answer
    x = 294.11

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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.