Finding the Fourth Proportional to 379.26, 522.99 and 312.84
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Solution
The fourth proportional to 379.26, 522.99 and 312.84 is: 431.40
Step by Step Solution
- Step 1: Write the proportion equation
379.26 : 522.99 = 312.84 : x - Step 2: Convert to fraction form
379.26/522.99 = 312.84/x - Step 3: Cross multiply
379.26x = 522.99 × 312.84 - Step 4: Simplify right side
379.26x = 163,612.19 - Step 5: Solve for x
x = 163,612.19/379.26 - Step 6: Final answer
x = 431.40
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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.