Finding the Fourth Proportional to 1,040,147.70, 1,560,221.55 and 292,193.70
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Solution
The fourth proportional to 1,040,147.70, 1,560,221.55 and 292,193.70 is: 438,290.55
Step by Step Solution
- Step 1: Write the proportion equation
1,040,147.70 : 1,560,221.55 = 292,193.70 : x - Step 2: Convert to fraction form
1,040,147.70/1,560,221.55 = 292,193.70/x - Step 3: Cross multiply
1,040,147.70x = 1,560,221.55 × 292,193.70 - Step 4: Simplify right side
1,040,147.70x = 455,886,907,514.24 - Step 5: Solve for x
x = 455,886,907,514.24/1,040,147.70 - Step 6: Final answer
x = 438,290.55
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Double scale
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Similar ratio
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1.5x scale
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.