Finding the Fourth Proportional to 431,728.80, 647,593.20 and 405,463.20
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Solution
The fourth proportional to 431,728.80, 647,593.20 and 405,463.20 is: 608,194.80
Step by Step Solution
- Step 1: Write the proportion equation
431,728.80 : 647,593.20 = 405,463.20 : x - Step 2: Convert to fraction form
431,728.80/647,593.20 = 405,463.20/x - Step 3: Cross multiply
431,728.80x = 647,593.20 × 405,463.20 - Step 4: Simplify right side
431,728.80x = 262,575,211,170.24 - Step 5: Solve for x
x = 262,575,211,170.24/431,728.80 - Step 6: Final answer
x = 608,194.80
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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.