Finding the Third Proportional to 685 and 1,167
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Solution
The third proportional to 685 and 1,167 is: 1,988.16
Step by Step Solution
- Step 1: Write the proportion equation
685 : 1,167 = 1,167 : x - Step 2: Convert to fraction form
685/1,167 = 1,167/x - Step 3: Cross multiply
685x = 1,167 × 1,167 - Step 4: Simplify right side
685x = 1,361,889 - Step 5: Solve for x
x = 1,361,889/685 - Step 6: Final answer
x = 1,988.16
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These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.