Finding the Fourth Proportional to 378,169.62, 521,871.42 and 208,403.74
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Solution
The fourth proportional to 378,169.62, 521,871.42 and 208,403.74 is: 287,595.70
Step by Step Solution
- Step 1: Write the proportion equation
378,169.62 : 521,871.42 = 208,403.74 : x - Step 2: Convert to fraction form
378,169.62/521,871.42 = 208,403.74/x - Step 3: Cross multiply
378,169.62x = 521,871.42 × 208,403.74 - Step 4: Simplify right side
378,169.62x = 108,759,955,727.11 - Step 5: Solve for x
x = 108,759,955,727.11/378,169.62 - Step 6: Final answer
x = 287,595.70
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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.