Finding the Fourth Proportional to 305,685.75, 458,381.17 and 128,145.09
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Solution
The fourth proportional to 305,685.75, 458,381.17 and 128,145.09 is: 192,155.82
Step by Step Solution
- Step 1: Write the proportion equation
305,685.75 : 458,381.17 = 128,145.09 : x - Step 2: Convert to fraction form
305,685.75/458,381.17 = 128,145.09/x - Step 3: Cross multiply
305,685.75x = 458,381.17 × 128,145.09 - Step 4: Simplify right side
305,685.75x = 58,739,296,283.96 - Step 5: Solve for x
x = 58,739,296,283.96/305,685.75 - Step 6: Final answer
x = 192,155.82
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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.