Finding the Fourth Proportional to 378.99, 523.09 and 247.93
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Solution
The fourth proportional to 378.99, 523.09 and 247.93 is: 342.20
Step by Step Solution
- Step 1: Write the proportion equation
378.99 : 523.09 = 247.93 : x - Step 2: Convert to fraction form
378.99/523.09 = 247.93/x - Step 3: Cross multiply
378.99x = 523.09 × 247.93 - Step 4: Simplify right side
378.99x = 129,688.71 - Step 5: Solve for x
x = 129,688.71/378.99 - Step 6: Final answer
x = 342.20
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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.