Finding the Third Proportional to 438 and 549
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Solution
The third proportional to 438 and 549 is: 688.13
Step by Step Solution
- Step 1: Write the proportion equation
438 : 549 = 549 : x - Step 2: Convert to fraction form
438/549 = 549/x - Step 3: Cross multiply
438x = 549 × 549 - Step 4: Simplify right side
438x = 301,401 - Step 5: Solve for x
x = 301,401/438 - Step 6: Final answer
x = 688.13
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These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.