Finding the Fourth Proportional to 285,942.58, 428,916.96 and 86,264.71
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Solution
The fourth proportional to 285,942.58, 428,916.96 and 86,264.71 is: 129,397.99
Step by Step Solution
- Step 1: Write the proportion equation
285,942.58 : 428,916.96 = 86,264.71 : x - Step 2: Convert to fraction form
285,942.58/428,916.96 = 86,264.71/x - Step 3: Cross multiply
285,942.58x = 428,916.96 × 86,264.71 - Step 4: Simplify right side
285,942.58x = 37,000,396,096.19 - Step 5: Solve for x
x = 37,000,396,096.19/285,942.58 - Step 6: Final answer
x = 129,397.99
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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.