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Finding the Third Proportional to 722.75 and 790.25

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Solution

The third proportional to 722.75 and 790.25 is: 864.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.75 : 790.25 = 790.25 : x
  2. Step 2: Convert to fraction form
    722.75/790.25 = 790.25/x
  3. Step 3: Cross multiply
    722.75x = 790.25 × 790.25
  4. Step 4: Simplify right side
    722.75x = 624,495.06
  5. Step 5: Solve for x
    x = 624,495.06/722.75
  6. Step 6: Final answer
    x = 864.05

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.