Finding the Fourth Proportional to 428,073.80, 642,110.70 and 218,121.80
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Solution
The fourth proportional to 428,073.80, 642,110.70 and 218,121.80 is: 327,182.70
Step by Step Solution
- Step 1: Write the proportion equation
428,073.80 : 642,110.70 = 218,121.80 : x - Step 2: Convert to fraction form
428,073.80/642,110.70 = 218,121.80/x - Step 3: Cross multiply
428,073.80x = 642,110.70 × 218,121.80 - Step 4: Simplify right side
428,073.80x = 140,058,341,683.26 - Step 5: Solve for x
x = 140,058,341,683.26/428,073.80 - Step 6: Final answer
x = 327,182.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.