Finding the Fourth Proportional to 378,927,975.57, 522,921,416.69 and 213,915,545.07
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Solution
The fourth proportional to 378,927,975.57, 522,921,416.69 and 213,915,545.07 is: 295,203,909.69
Step by Step Solution
- Step 1: Write the proportion equation
378,927,975.57 : 522,921,416.69 = 213,915,545.07 : x - Step 2: Convert to fraction form
378,927,975.57/522,921,416.69 = 213,915,545.07/x - Step 3: Cross multiply
378,927,975.57x = 522,921,416.69 × 213,915,545.07 - Step 4: Simplify right side
378,927,975.57x = 111,861,019,878,591,776 - Step 5: Solve for x
x = 111,861,019,878,591,776/378,927,975.57 - Step 6: Final answer
x = 295,203,909.69
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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.