Finding the Third Proportional to 489 and 939
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Solution
The third proportional to 489 and 939 is: 1,803.11
Step by Step Solution
- Step 1: Write the proportion equation
489 : 939 = 939 : x - Step 2: Convert to fraction form
489/939 = 939/x - Step 3: Cross multiply
489x = 939 × 939 - Step 4: Simplify right side
489x = 881,721 - Step 5: Solve for x
x = 881,721/489 - Step 6: Final answer
x = 1,803.11
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These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.