Finding the Fourth Proportional to 1,221,015.26, 1,685,107.62 and 711,706.70
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Solution
The fourth proportional to 1,221,015.26, 1,685,107.62 and 711,706.70 is: 982,217.36
Step by Step Solution
- Step 1: Write the proportion equation
1,221,015.26 : 1,685,107.62 = 711,706.70 : x - Step 2: Convert to fraction form
1,221,015.26/1,685,107.62 = 711,706.70/x - Step 3: Cross multiply
1,221,015.26x = 1,685,107.62 × 711,706.70 - Step 4: Simplify right side
1,221,015.26x = 1,199,302,383,375.05 - Step 5: Solve for x
x = 1,199,302,383,375.05/1,221,015.26 - Step 6: Final answer
x = 982,217.36
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.