Finding the Fourth Proportional to 431,688.26, 647,163.08 and 165,639.70
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Solution
The fourth proportional to 431,688.26, 647,163.08 and 165,639.70 is: 248,317.84
Step by Step Solution
- Step 1: Write the proportion equation
431,688.26 : 647,163.08 = 165,639.70 : x - Step 2: Convert to fraction form
431,688.26/647,163.08 = 165,639.70/x - Step 3: Cross multiply
431,688.26x = 647,163.08 × 165,639.70 - Step 4: Simplify right side
431,688.26x = 107,195,898,422.28 - Step 5: Solve for x
x = 107,195,898,422.28/431,688.26 - Step 6: Final answer
x = 248,317.84
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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.