Finding the Fourth Proportional to 312,772.86, 431,874.99 and 288,890.82
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Solution
The fourth proportional to 312,772.86, 431,874.99 and 288,890.82 is: 398,898.80
Step by Step Solution
- Step 1: Write the proportion equation
312,772.86 : 431,874.99 = 288,890.82 : x - Step 2: Convert to fraction form
312,772.86/431,874.99 = 288,890.82/x - Step 3: Cross multiply
312,772.86x = 431,874.99 × 288,890.82 - Step 4: Simplify right side
312,772.86x = 124,764,719,998.59 - Step 5: Solve for x
x = 124,764,719,998.59/312,772.86 - Step 6: Final answer
x = 398,898.80
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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.