Finding the Third Proportional to 200 and 391
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Solution
The third proportional to 200 and 391 is: 764.41
Step by Step Solution
- Step 1: Write the proportion equation
200 : 391 = 391 : x - Step 2: Convert to fraction form
200/391 = 391/x - Step 3: Cross multiply
200x = 391 × 391 - Step 4: Simplify right side
200x = 152,881 - Step 5: Solve for x
x = 152,881/200 - Step 6: Final answer
x = 764.41
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These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.