Finding the Fourth Proportional to 309,391.75, 426,161.99 and 218,590.09
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Solution
The fourth proportional to 309,391.75, 426,161.99 and 218,590.09 is: 301,090.08
Step by Step Solution
- Step 1: Write the proportion equation
309,391.75 : 426,161.99 = 218,590.09 : x - Step 2: Convert to fraction form
309,391.75/426,161.99 = 218,590.09/x - Step 3: Cross multiply
309,391.75x = 426,161.99 × 218,590.09 - Step 4: Simplify right side
309,391.75x = 93,154,785,617.87 - Step 5: Solve for x
x = 93,154,785,617.87/309,391.75 - Step 6: Final answer
x = 301,090.08
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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.