Finding the Fourth Proportional to 431,759.80, 647,639.70 and 221,807.80
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Solution
The fourth proportional to 431,759.80, 647,639.70 and 221,807.80 is: 332,711.70
Step by Step Solution
- Step 1: Write the proportion equation
431,759.80 : 647,639.70 = 221,807.80 : x - Step 2: Convert to fraction form
431,759.80/647,639.70 = 221,807.80/x - Step 3: Cross multiply
431,759.80x = 647,639.70 × 221,807.80 - Step 4: Simplify right side
431,759.80x = 143,651,537,049.66 - Step 5: Solve for x
x = 143,651,537,049.66/431,759.80 - Step 6: Final answer
x = 332,711.70
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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.