Finding the Fourth Proportional to 804,987.70, 1,207,481.55 and 431,739.70
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Solution
The fourth proportional to 804,987.70, 1,207,481.55 and 431,739.70 is: 647,609.55
Step by Step Solution
- Step 1: Write the proportion equation
804,987.70 : 1,207,481.55 = 431,739.70 : x - Step 2: Convert to fraction form
804,987.70/1,207,481.55 = 431,739.70/x - Step 3: Cross multiply
804,987.70x = 1,207,481.55 × 431,739.70 - Step 4: Simplify right side
804,987.70x = 521,317,722,152.54 - Step 5: Solve for x
x = 521,317,722,152.54/804,987.70 - Step 6: Final answer
x = 647,609.55
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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.