Finding the Third Proportional to 487 and 931
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Solution
The third proportional to 487 and 931 is: 1,779.80
Step by Step Solution
- Step 1: Write the proportion equation
487 : 931 = 931 : x - Step 2: Convert to fraction form
487/931 = 931/x - Step 3: Cross multiply
487x = 931 × 931 - Step 4: Simplify right side
487x = 866,761 - Step 5: Solve for x
x = 866,761/487 - Step 6: Final answer
x = 1,779.80
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Why These Related Problems?
These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.