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Finding the Third Proportional to 620.44 and 1,021.78

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Solution

The third proportional to 620.44 and 1,021.78 is: 1,682.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.44 : 1,021.78 = 1,021.78 : x
  2. Step 2: Convert to fraction form
    620.44/1,021.78 = 1,021.78/x
  3. Step 3: Cross multiply
    620.44x = 1,021.78 × 1,021.78
  4. Step 4: Simplify right side
    620.44x = 1,044,036.92
  5. Step 5: Solve for x
    x = 1,044,036.92/620.44
  6. Step 6: Final answer
    x = 1,682.74

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.