Finding the Third Proportional to 486 and 620
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Solution
The third proportional to 486 and 620 is: 790.95
Step by Step Solution
- Step 1: Write the proportion equation
486 : 620 = 620 : x - Step 2: Convert to fraction form
486/620 = 620/x - Step 3: Cross multiply
486x = 620 × 620 - Step 4: Simplify right side
486x = 384,400 - Step 5: Solve for x
x = 384,400/486 - Step 6: Final answer
x = 790.95
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These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.