Finding the Fourth Proportional to 143.23, 213.61 and 140.80
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Solution
The fourth proportional to 143.23, 213.61 and 140.80 is: 209.99
Step by Step Solution
- Step 1: Write the proportion equation
143.23 : 213.61 = 140.80 : x - Step 2: Convert to fraction form
143.23/213.61 = 140.80/x - Step 3: Cross multiply
143.23x = 213.61 × 140.80 - Step 4: Simplify right side
143.23x = 30,076.29 - Step 5: Solve for x
x = 30,076.29/143.23 - Step 6: Final answer
x = 209.99
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.