Finding the Fourth Proportional to 378.06, 520.99 and 278.43
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Solution
The fourth proportional to 378.06, 520.99 and 278.43 is: 383.69
Step by Step Solution
- Step 1: Write the proportion equation
378.06 : 520.99 = 278.43 : x - Step 2: Convert to fraction form
378.06/520.99 = 278.43/x - Step 3: Cross multiply
378.06x = 520.99 × 278.43 - Step 4: Simplify right side
378.06x = 145,059.25 - Step 5: Solve for x
x = 145,059.25/378.06 - Step 6: Final answer
x = 383.69
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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.