Finding the Fourth Proportional to 449.79, 620.76 and 272.88
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Solution
The fourth proportional to 449.79, 620.76 and 272.88 is: 376.60
Step by Step Solution
- Step 1: Write the proportion equation
449.79 : 620.76 = 272.88 : x - Step 2: Convert to fraction form
449.79/620.76 = 272.88/x - Step 3: Cross multiply
449.79x = 620.76 × 272.88 - Step 4: Simplify right side
449.79x = 169,392.99 - Step 5: Solve for x
x = 169,392.99/449.79 - Step 6: Final answer
x = 376.60
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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.