Finding the Fourth Proportional to 62.89, 86.61 and 57.09
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Solution
The fourth proportional to 62.89, 86.61 and 57.09 is: 78.62
Step by Step Solution
- Step 1: Write the proportion equation
62.89 : 86.61 = 57.09 : x - Step 2: Convert to fraction form
62.89/86.61 = 57.09/x - Step 3: Cross multiply
62.89x = 86.61 × 57.09 - Step 4: Simplify right side
62.89x = 4,944.13 - Step 5: Solve for x
x = 4,944.13/62.89 - Step 6: Final answer
x = 78.62
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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.