Finding the Fourth Proportional to 62.75, 86.58 and 42.05
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Solution
The fourth proportional to 62.75, 86.58 and 42.05 is: 58.02
Step by Step Solution
- Step 1: Write the proportion equation
62.75 : 86.58 = 42.05 : x - Step 2: Convert to fraction form
62.75/86.58 = 42.05/x - Step 3: Cross multiply
62.75x = 86.58 × 42.05 - Step 4: Simplify right side
62.75x = 3,640.91 - Step 5: Solve for x
x = 3,640.91/62.75 - Step 6: Final answer
x = 58.02
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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.