Finding the Third Proportional to 17 and 39
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Solution
The third proportional to 17 and 39 is: 89.47
Step by Step Solution
- Step 1: Write the proportion equation
17 : 39 = 39 : x - Step 2: Convert to fraction form
17/39 = 39/x - Step 3: Cross multiply
17x = 39 × 39 - Step 4: Simplify right side
17x = 1,521 - Step 5: Solve for x
x = 1,521/17 - Step 6: Final answer
x = 89.47
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Why These Related Problems?
These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.