Finding the Third Proportional to 438 and 638
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Solution
The third proportional to 438 and 638 is: 929.32
Step by Step Solution
- Step 1: Write the proportion equation
438 : 638 = 638 : x - Step 2: Convert to fraction form
438/638 = 638/x - Step 3: Cross multiply
438x = 638 × 638 - Step 4: Simplify right side
438x = 407,044 - Step 5: Solve for x
x = 407,044/438 - Step 6: Final answer
x = 929.32
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These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.