Finding the Fourth Proportional to 543,378.20, 815,067.30 and 431,403.80
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Solution
The fourth proportional to 543,378.20, 815,067.30 and 431,403.80 is: 647,105.70
Step by Step Solution
- Step 1: Write the proportion equation
543,378.20 : 815,067.30 = 431,403.80 : x - Step 2: Convert to fraction form
543,378.20/815,067.30 = 431,403.80/x - Step 3: Cross multiply
543,378.20x = 815,067.30 × 431,403.80 - Step 4: Simplify right side
543,378.20x = 351,623,130,475.74 - Step 5: Solve for x
x = 351,623,130,475.74/543,378.20 - Step 6: Final answer
x = 647,105.70
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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.