Finding the Fourth Proportional to 428,387.43, 642,581.15 and 218,172.99
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Solution
The fourth proportional to 428,387.43, 642,581.15 and 218,172.99 is: 327,259.49
Step by Step Solution
- Step 1: Write the proportion equation
428,387.43 : 642,581.15 = 218,172.99 : x - Step 2: Convert to fraction form
428,387.43/642,581.15 = 218,172.99/x - Step 3: Cross multiply
428,387.43x = 642,581.15 × 218,172.99 - Step 4: Simplify right side
428,387.43x = 140,193,853,359.18 - Step 5: Solve for x
x = 140,193,853,359.18/428,387.43 - Step 6: Final answer
x = 327,259.49
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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.