Finding the Fourth Proportional to 395.80, 546.19 and 321.99
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Solution
The fourth proportional to 395.80, 546.19 and 321.99 is: 444.34
Step by Step Solution
- Step 1: Write the proportion equation
395.80 : 546.19 = 321.99 : x - Step 2: Convert to fraction form
395.80/546.19 = 321.99/x - Step 3: Cross multiply
395.80x = 546.19 × 321.99 - Step 4: Simplify right side
395.80x = 175,869.75 - Step 5: Solve for x
x = 175,869.75/395.80 - Step 6: Final answer
x = 444.34
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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.