Finding the Fourth Proportional to 33.30, 45.81 and 30.99
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Solution
The fourth proportional to 33.30, 45.81 and 30.99 is: 42.63
Step by Step Solution
- Step 1: Write the proportion equation
33.30 : 45.81 = 30.99 : x - Step 2: Convert to fraction form
33.30/45.81 = 30.99/x - Step 3: Cross multiply
33.30x = 45.81 × 30.99 - Step 4: Simplify right side
33.30x = 1,419.65 - Step 5: Solve for x
x = 1,419.65/33.30 - Step 6: Final answer
x = 42.63
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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.