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Finding the Third Proportional to 210.73 and 280.76

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Solution

The third proportional to 210.73 and 280.76 is: 374.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.73 : 280.76 = 280.76 : x
  2. Step 2: Convert to fraction form
    210.73/280.76 = 280.76/x
  3. Step 3: Cross multiply
    210.73x = 280.76 × 280.76
  4. Step 4: Simplify right side
    210.73x = 78,824.95
  5. Step 5: Solve for x
    x = 78,824.95/210.73
  6. Step 6: Final answer
    x = 374.06

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.