Finding the Fourth Proportional to 392,916.88, 542,290.80 and 231,811.84
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Solution
The fourth proportional to 392,916.88, 542,290.80 and 231,811.84 is: 319,938.99
Step by Step Solution
- Step 1: Write the proportion equation
392,916.88 : 542,290.80 = 231,811.84 : x - Step 2: Convert to fraction form
392,916.88/542,290.80 = 231,811.84/x - Step 3: Cross multiply
392,916.88x = 542,290.80 × 231,811.84 - Step 4: Simplify right side
392,916.88x = 125,709,428,163.07 - Step 5: Solve for x
x = 125,709,428,163.07/392,916.88 - Step 6: Final answer
x = 319,938.99
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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.