Finding the Fourth Proportional to 42.12, 58.42 and 40.88
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Solution
The fourth proportional to 42.12, 58.42 and 40.88 is: 56.70
Step by Step Solution
- Step 1: Write the proportion equation
42.12 : 58.42 = 40.88 : x - Step 2: Convert to fraction form
42.12/58.42 = 40.88/x - Step 3: Cross multiply
42.12x = 58.42 × 40.88 - Step 4: Simplify right side
42.12x = 2,388.21 - Step 5: Solve for x
x = 2,388.21/42.12 - Step 6: Final answer
x = 56.70
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.