Finding the Fourth Proportional to 421,138.86, 581,170.68 and 239,850.78
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Solution
The fourth proportional to 421,138.86, 581,170.68 and 239,850.78 is: 330,993.54
Step by Step Solution
- Step 1: Write the proportion equation
421,138.86 : 581,170.68 = 239,850.78 : x - Step 2: Convert to fraction form
421,138.86/581,170.68 = 239,850.78/x - Step 3: Cross multiply
421,138.86x = 581,170.68 × 239,850.78 - Step 4: Simplify right side
421,138.86x = 139,394,240,911.13 - Step 5: Solve for x
x = 139,394,240,911.13/421,138.86 - Step 6: Final answer
x = 330,993.54
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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.