Finding the Fourth Proportional to 65.91, 90.82 and 58.05
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Solution
The fourth proportional to 65.91, 90.82 and 58.05 is: 79.99
Step by Step Solution
- Step 1: Write the proportion equation
65.91 : 90.82 = 58.05 : x - Step 2: Convert to fraction form
65.91/90.82 = 58.05/x - Step 3: Cross multiply
65.91x = 90.82 × 58.05 - Step 4: Simplify right side
65.91x = 5,272.10 - Step 5: Solve for x
x = 5,272.10/65.91 - Step 6: Final answer
x = 79.99
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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.