Finding the Fourth Proportional to 378,118.13, 521,814.15 and 208,363.19
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Solution
The fourth proportional to 378,118.13, 521,814.15 and 208,363.19 is: 287,547.33
Step by Step Solution
- Step 1: Write the proportion equation
378,118.13 : 521,814.15 = 208,363.19 : x - Step 2: Convert to fraction form
378,118.13/521,814.15 = 208,363.19/x - Step 3: Cross multiply
378,118.13x = 521,814.15 × 208,363.19 - Step 4: Simplify right side
378,118.13x = 108,726,858,272.07 - Step 5: Solve for x
x = 108,726,858,272.07/378,118.13 - Step 6: Final answer
x = 287,547.33
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1.5x scale
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.