Finding the Fourth Proportional to 431,721.72, 647,584.16 and 132,201.09
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Solution
The fourth proportional to 431,721.72, 647,584.16 and 132,201.09 is: 198,302.12
Step by Step Solution
- Step 1: Write the proportion equation
431,721.72 : 647,584.16 = 132,201.09 : x - Step 2: Convert to fraction form
431,721.72/647,584.16 = 132,201.09/x - Step 3: Cross multiply
431,721.72x = 647,584.16 × 132,201.09 - Step 4: Simplify right side
431,721.72x = 85,611,331,157.73 - Step 5: Solve for x
x = 85,611,331,157.73/431,721.72 - Step 6: Final answer
x = 198,302.12
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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.