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Finding the Third Proportional to 211.88 and 288.94

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Solution

The third proportional to 211.88 and 288.94 is: 394.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.88 : 288.94 = 288.94 : x
  2. Step 2: Convert to fraction form
    211.88/288.94 = 288.94/x
  3. Step 3: Cross multiply
    211.88x = 288.94 × 288.94
  4. Step 4: Simplify right side
    211.88x = 83,484.88
  5. Step 5: Solve for x
    x = 83,484.88/211.88
  6. Step 6: Final answer
    x = 394.03

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.