Finding the Fourth Proportional to 393,434.30, 542,926.97 and 221,362.06
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Solution
The fourth proportional to 393,434.30, 542,926.97 and 221,362.06 is: 305,472.68
Step by Step Solution
- Step 1: Write the proportion equation
393,434.30 : 542,926.97 = 221,362.06 : x - Step 2: Convert to fraction form
393,434.30/542,926.97 = 221,362.06/x - Step 3: Cross multiply
393,434.30x = 542,926.97 × 221,362.06 - Step 4: Simplify right side
393,434.30x = 120,183,431,704.85 - Step 5: Solve for x
x = 120,183,431,704.85/393,434.30 - Step 6: Final answer
x = 305,472.68
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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.