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Finding the Third Proportional to 672.75 and 814.50

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Solution

The third proportional to 672.75 and 814.50 is: 986.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.75 : 814.50 = 814.50 : x
  2. Step 2: Convert to fraction form
    672.75/814.50 = 814.50/x
  3. Step 3: Cross multiply
    672.75x = 814.50 × 814.50
  4. Step 4: Simplify right side
    672.75x = 663,410.25
  5. Step 5: Solve for x
    x = 663,410.25/672.75
  6. Step 6: Final answer
    x = 986.12

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.