Finding the Third Proportional to 357 and 388.50
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Solution
The third proportional to 357 and 388.50 is: 422.78
Step by Step Solution
- Step 1: Write the proportion equation
357 : 388.50 = 388.50 : x - Step 2: Convert to fraction form
357/388.50 = 388.50/x - Step 3: Cross multiply
357x = 388.50 × 388.50 - Step 4: Simplify right side
357x = 150,932.25 - Step 5: Solve for x
x = 150,932.25/357 - Step 6: Final answer
x = 422.78
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These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.