Finding the Third Proportional to 530 and 641
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Solution
The third proportional to 530 and 641 is: 775.25
Step by Step Solution
- Step 1: Write the proportion equation
530 : 641 = 641 : x - Step 2: Convert to fraction form
530/641 = 641/x - Step 3: Cross multiply
530x = 641 × 641 - Step 4: Simplify right side
530x = 410,881 - Step 5: Solve for x
x = 410,881/530 - Step 6: Final answer
x = 775.25
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Why These Related Problems?
These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.