Finding the Third Proportional to 306 and 642
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Solution
The third proportional to 306 and 642 is: 1,346.94
Step by Step Solution
- Step 1: Write the proportion equation
306 : 642 = 642 : x - Step 2: Convert to fraction form
306/642 = 642/x - Step 3: Cross multiply
306x = 642 × 642 - Step 4: Simplify right side
306x = 412,164 - Step 5: Solve for x
x = 412,164/306 - Step 6: Final answer
x = 1,346.94
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These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.