Finding the Fourth Proportional to 30.84, 42.51 and 29.01
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Solution
The fourth proportional to 30.84, 42.51 and 29.01 is: 39.99
Step by Step Solution
- Step 1: Write the proportion equation
30.84 : 42.51 = 29.01 : x - Step 2: Convert to fraction form
30.84/42.51 = 29.01/x - Step 3: Cross multiply
30.84x = 42.51 × 29.01 - Step 4: Simplify right side
30.84x = 1,233.22 - Step 5: Solve for x
x = 1,233.22/30.84 - Step 6: Final answer
x = 39.99
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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.