Finding the Fourth Proportional to 1,286,738.80, 1,930,576.20 and 445,375.60
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Solution
The fourth proportional to 1,286,738.80, 1,930,576.20 and 445,375.60 is: 668,225.39
Step by Step Solution
- Step 1: Write the proportion equation
1,286,738.80 : 1,930,576.20 = 445,375.60 : x - Step 2: Convert to fraction form
1,286,738.80/1,930,576.20 = 445,375.60/x - Step 3: Cross multiply
1,286,738.80x = 1,930,576.20 × 445,375.60 - Step 4: Simplify right side
1,286,738.80x = 859,831,533,420.72 - Step 5: Solve for x
x = 859,831,533,420.72/1,286,738.80 - Step 6: Final answer
x = 668,225.39
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.