Finding the Fourth Proportional to 6.72, 9.28 and 3.99
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Solution
The fourth proportional to 6.72, 9.28 and 3.99 is: 5.51
Step by Step Solution
- Step 1: Write the proportion equation
6.72 : 9.28 = 3.99 : x - Step 2: Convert to fraction form
6.72/9.28 = 3.99/x - Step 3: Cross multiply
6.72x = 9.28 × 3.99 - Step 4: Simplify right side
6.72x = 37.03 - Step 5: Solve for x
x = 37.03/6.72 - Step 6: Final answer
x = 5.51
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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.