Finding the Fourth Proportional to 252.12, 378.05 and 143.99
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Solution
The fourth proportional to 252.12, 378.05 and 143.99 is: 215.90
Step by Step Solution
- Step 1: Write the proportion equation
252.12 : 378.05 = 143.99 : x - Step 2: Convert to fraction form
252.12/378.05 = 143.99/x - Step 3: Cross multiply
252.12x = 378.05 × 143.99 - Step 4: Simplify right side
252.12x = 54,432.81 - Step 5: Solve for x
x = 54,432.81/252.12 - Step 6: Final answer
x = 215.90
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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.