Finding the Third Proportional to 789 and 1,281
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Solution
The third proportional to 789 and 1,281 is: 2,079.80
Step by Step Solution
- Step 1: Write the proportion equation
789 : 1,281 = 1,281 : x - Step 2: Convert to fraction form
789/1,281 = 1,281/x - Step 3: Cross multiply
789x = 1,281 × 1,281 - Step 4: Simplify right side
789x = 1,640,961 - Step 5: Solve for x
x = 1,640,961/789 - Step 6: Final answer
x = 2,079.80
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Why These Related Problems?
These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.