Finding the Fourth Proportional to 65.37, 90.30 and 54.99
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Solution
The fourth proportional to 65.37, 90.30 and 54.99 is: 75.96
Step by Step Solution
- Step 1: Write the proportion equation
65.37 : 90.30 = 54.99 : x - Step 2: Convert to fraction form
65.37/90.30 = 54.99/x - Step 3: Cross multiply
65.37x = 90.30 × 54.99 - Step 4: Simplify right side
65.37x = 4,965.60 - Step 5: Solve for x
x = 4,965.60/65.37 - Step 6: Final answer
x = 75.96
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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.