Finding the Fourth Proportional to 65.82, 90.38 and 57.99
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Solution
The fourth proportional to 65.82, 90.38 and 57.99 is: 79.63
Step by Step Solution
- Step 1: Write the proportion equation
65.82 : 90.38 = 57.99 : x - Step 2: Convert to fraction form
65.82/90.38 = 57.99/x - Step 3: Cross multiply
65.82x = 90.38 × 57.99 - Step 4: Simplify right side
65.82x = 5,241.14 - Step 5: Solve for x
x = 5,241.14/65.82 - Step 6: Final answer
x = 79.63
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.