Finding the Fourth Proportional to 431,639.80, 647,459.70 and 221,687.80
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Solution
The fourth proportional to 431,639.80, 647,459.70 and 221,687.80 is: 332,531.70
Step by Step Solution
- Step 1: Write the proportion equation
431,639.80 : 647,459.70 = 221,687.80 : x - Step 2: Convert to fraction form
431,639.80/647,459.70 = 221,687.80/x - Step 3: Cross multiply
431,639.80x = 647,459.70 × 221,687.80 - Step 4: Simplify right side
431,639.80x = 143,533,916,481.66 - Step 5: Solve for x
x = 143,533,916,481.66/431,639.80 - Step 6: Final answer
x = 332,531.70
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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.