Finding the Third Proportional to 878 and 1,860
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Solution
The third proportional to 878 and 1,860 is: 3,940.32
Step by Step Solution
- Step 1: Write the proportion equation
878 : 1,860 = 1,860 : x - Step 2: Convert to fraction form
878/1,860 = 1,860/x - Step 3: Cross multiply
878x = 1,860 × 1,860 - Step 4: Simplify right side
878x = 3,459,600 - Step 5: Solve for x
x = 3,459,600/878 - Step 6: Final answer
x = 3,940.32
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These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.