Finding the Fourth Proportional to 621,121.65, 857,142.71 and 349,190.75
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Solution
The fourth proportional to 621,121.65, 857,142.71 and 349,190.75 is: 481,880.33
Step by Step Solution
- Step 1: Write the proportion equation
621,121.65 : 857,142.71 = 349,190.75 : x - Step 2: Convert to fraction form
621,121.65/857,142.71 = 349,190.75/x - Step 3: Cross multiply
621,121.65x = 857,142.71 × 349,190.75 - Step 4: Simplify right side
621,121.65x = 299,306,305,761.93 - Step 5: Solve for x
x = 299,306,305,761.93/621,121.65 - Step 6: Final answer
x = 481,880.33
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1.5x scale
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.