Finding the Fourth Proportional to 363,389.92, 545,121.22 and 138,939.18
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Solution
The fourth proportional to 363,389.92, 545,121.22 and 138,939.18 is: 208,422.66
Step by Step Solution
- Step 1: Write the proportion equation
363,389.92 : 545,121.22 = 138,939.18 : x - Step 2: Convert to fraction form
363,389.92/545,121.22 = 138,939.18/x - Step 3: Cross multiply
363,389.92x = 545,121.22 × 138,939.18 - Step 4: Simplify right side
363,389.92x = 75,738,695,307.40 - Step 5: Solve for x
x = 75,738,695,307.40/363,389.92 - Step 6: Final answer
x = 208,422.66
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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.