Finding the Third Proportional to 639 and 1,425
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Solution
The third proportional to 639 and 1,425 is: 3,177.82
Step by Step Solution
- Step 1: Write the proportion equation
639 : 1,425 = 1,425 : x - Step 2: Convert to fraction form
639/1,425 = 1,425/x - Step 3: Cross multiply
639x = 1,425 × 1,425 - Step 4: Simplify right side
639x = 2,030,625 - Step 5: Solve for x
x = 2,030,625/639 - Step 6: Final answer
x = 3,177.82
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These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.