Finding the Fourth Proportional to 378,151.98, 521,874.99 and 208,386.09
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Solution
The fourth proportional to 378,151.98, 521,874.99 and 208,386.09 is: 287,586.72
Step by Step Solution
- Step 1: Write the proportion equation
378,151.98 : 521,874.99 = 208,386.09 : x - Step 2: Convert to fraction form
378,151.98/521,874.99 = 208,386.09/x - Step 3: Cross multiply
378,151.98x = 521,874.99 × 208,386.09 - Step 4: Simplify right side
378,151.98x = 108,751,488,634.89 - Step 5: Solve for x
x = 108,751,488,634.89/378,151.98 - Step 6: Final answer
x = 287,586.72
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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.