Finding the Fourth Proportional to 721.26, 995.49 and 511.74
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Solution
The fourth proportional to 721.26, 995.49 and 511.74 is: 706.31
Step by Step Solution
- Step 1: Write the proportion equation
721.26 : 995.49 = 511.74 : x - Step 2: Convert to fraction form
721.26/995.49 = 511.74/x - Step 3: Cross multiply
721.26x = 995.49 × 511.74 - Step 4: Simplify right side
721.26x = 509,432.05 - Step 5: Solve for x
x = 509,432.05/721.26 - Step 6: Final answer
x = 706.31
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.