Finding the Fourth Proportional to 42.55, 58.68 and 30.31
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Solution
The fourth proportional to 42.55, 58.68 and 30.31 is: 41.80
Step by Step Solution
- Step 1: Write the proportion equation
42.55 : 58.68 = 30.31 : x - Step 2: Convert to fraction form
42.55/58.68 = 30.31/x - Step 3: Cross multiply
42.55x = 58.68 × 30.31 - Step 4: Simplify right side
42.55x = 1,778.44 - Step 5: Solve for x
x = 1,778.44/42.55 - Step 6: Final answer
x = 41.80
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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.