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Finding the Third Proportional to 762 and 820

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Solution

The third proportional to 762 and 820 is: 882.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    762 : 820 = 820 : x
  2. Step 2: Convert to fraction form
    762/820 = 820/x
  3. Step 3: Cross multiply
    762x = 820 × 820
  4. Step 4: Simplify right side
    762x = 672,400
  5. Step 5: Solve for x
    x = 672,400/762
  6. Step 6: Final answer
    x = 882.41

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.