Finding the Fourth Proportional to 343,367.09, 515,039.70 and 90,639.80
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Solution
The fourth proportional to 343,367.09, 515,039.70 and 90,639.80 is: 135,956.81
Step by Step Solution
- Step 1: Write the proportion equation
343,367.09 : 515,039.70 = 90,639.80 : x - Step 2: Convert to fraction form
343,367.09/515,039.70 = 90,639.80/x - Step 3: Cross multiply
343,367.09x = 515,039.70 × 90,639.80 - Step 4: Simplify right side
343,367.09x = 46,683,095,400.06 - Step 5: Solve for x
x = 46,683,095,400.06/343,367.09 - Step 6: Final answer
x = 135,956.81
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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.