Finding the Fourth Proportional to 386,381.23, 579,162.79 and 129,969.70
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Solution
The fourth proportional to 386,381.23, 579,162.79 and 129,969.70 is: 194,816.95
Step by Step Solution
- Step 1: Write the proportion equation
386,381.23 : 579,162.79 = 129,969.70 : x - Step 2: Convert to fraction form
386,381.23/579,162.79 = 129,969.70/x - Step 3: Cross multiply
386,381.23x = 579,162.79 × 129,969.70 - Step 4: Simplify right side
386,381.23x = 75,273,614,067.46 - Step 5: Solve for x
x = 75,273,614,067.46/386,381.23 - Step 6: Final answer
x = 194,816.95
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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.