Finding the Fourth Proportional to 42.26, 63.48 and 30.88
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Solution
The fourth proportional to 42.26, 63.48 and 30.88 is: 46.40
Step by Step Solution
- Step 1: Write the proportion equation
42.26 : 63.48 = 30.88 : x - Step 2: Convert to fraction form
42.26/63.48 = 30.88/x - Step 3: Cross multiply
42.26x = 63.48 × 30.88 - Step 4: Simplify right side
42.26x = 1,960.46 - Step 5: Solve for x
x = 1,960.46/42.26 - Step 6: Final answer
x = 46.40
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.