Finding the Third Proportional to 420 and 636
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Solution
The third proportional to 420 and 636 is: 963.09
Step by Step Solution
- Step 1: Write the proportion equation
420 : 636 = 636 : x - Step 2: Convert to fraction form
420/636 = 636/x - Step 3: Cross multiply
420x = 636 × 636 - Step 4: Simplify right side
420x = 404,496 - Step 5: Solve for x
x = 404,496/420 - Step 6: Final answer
x = 963.09
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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.