Finding the Fourth Proportional to 431,687.26, 647,161.58 and 165,638.70
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Solution
The fourth proportional to 431,687.26, 647,161.58 and 165,638.70 is: 248,316.35
Step by Step Solution
- Step 1: Write the proportion equation
431,687.26 : 647,161.58 = 165,638.70 : x - Step 2: Convert to fraction form
431,687.26/647,161.58 = 165,638.70/x - Step 3: Cross multiply
431,687.26x = 647,161.58 × 165,638.70 - Step 4: Simplify right side
431,687.26x = 107,195,002,801.15 - Step 5: Solve for x
x = 107,195,002,801.15/431,687.26 - Step 6: Final answer
x = 248,316.35
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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.