Finding the Third Proportional to 915 and 1,720
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Solution
The third proportional to 915 and 1,720 is: 3,233.22
Step by Step Solution
- Step 1: Write the proportion equation
915 : 1,720 = 1,720 : x - Step 2: Convert to fraction form
915/1,720 = 1,720/x - Step 3: Cross multiply
915x = 1,720 × 1,720 - Step 4: Simplify right side
915x = 2,958,400 - Step 5: Solve for x
x = 2,958,400/915 - Step 6: Final answer
x = 3,233.22
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Why These Related Problems?
These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.