Finding the Fourth Proportional to 804,991.20, 1,207,486.80 and 431,743.20
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Solution
The fourth proportional to 804,991.20, 1,207,486.80 and 431,743.20 is: 647,614.80
Step by Step Solution
- Step 1: Write the proportion equation
804,991.20 : 1,207,486.80 = 431,743.20 : x - Step 2: Convert to fraction form
804,991.20/1,207,486.80 = 431,743.20/x - Step 3: Cross multiply
804,991.20x = 1,207,486.80 × 431,743.20 - Step 4: Simplify right side
804,991.20x = 521,324,214,989.76 - Step 5: Solve for x
x = 521,324,214,989.76/804,991.20 - Step 6: Final answer
x = 647,614.80
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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.