Finding the Third Proportional to 557 and 1,221.50
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Solution
The third proportional to 557 and 1,221.50 is: 2,678.75
Step by Step Solution
- Step 1: Write the proportion equation
557 : 1,221.50 = 1,221.50 : x - Step 2: Convert to fraction form
557/1,221.50 = 1,221.50/x - Step 3: Cross multiply
557x = 1,221.50 × 1,221.50 - Step 4: Simplify right side
557x = 1,492,062.25 - Step 5: Solve for x
x = 1,492,062.25/557 - Step 6: Final answer
x = 2,678.75
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Why These Related Problems?
These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.