Finding the Third Proportional to 389 and 630
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Solution
The third proportional to 389 and 630 is: 1,020.31
Step by Step Solution
- Step 1: Write the proportion equation
389 : 630 = 630 : x - Step 2: Convert to fraction form
389/630 = 630/x - Step 3: Cross multiply
389x = 630 × 630 - Step 4: Simplify right side
389x = 396,900 - Step 5: Solve for x
x = 396,900/389 - Step 6: Final answer
x = 1,020.31
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Why These Related Problems?
These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.