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Finding the Third Proportional to 490.50 and 788.25

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Solution

The third proportional to 490.50 and 788.25 is: 1,266.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.50 : 788.25 = 788.25 : x
  2. Step 2: Convert to fraction form
    490.50/788.25 = 788.25/x
  3. Step 3: Cross multiply
    490.50x = 788.25 × 788.25
  4. Step 4: Simplify right side
    490.50x = 621,338.06
  5. Step 5: Solve for x
    x = 621,338.06/490.50
  6. Step 6: Final answer
    x = 1,266.74

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.