Finding the Fourth Proportional to 378,927,976.19, 522,921,417.56 and 213,915,545.69
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Solution
The fourth proportional to 378,927,976.19, 522,921,417.56 and 213,915,545.69 is: 295,203,910.55
Step by Step Solution
- Step 1: Write the proportion equation
378,927,976.19 : 522,921,417.56 = 213,915,545.69 : x - Step 2: Convert to fraction form
378,927,976.19/522,921,417.56 = 213,915,545.69/x - Step 3: Cross multiply
378,927,976.19x = 522,921,417.56 × 213,915,545.69 - Step 4: Simplify right side
378,927,976.19x = 111,861,020,389,266,176 - Step 5: Solve for x
x = 111,861,020,389,266,176/378,927,976.19 - Step 6: Final answer
x = 295,203,910.55
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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.