Finding the Fourth Proportional to 77.10, 115.65 and 22.99
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Solution
The fourth proportional to 77.10, 115.65 and 22.99 is: 34.49
Step by Step Solution
- Step 1: Write the proportion equation
77.10 : 115.65 = 22.99 : x - Step 2: Convert to fraction form
77.10/115.65 = 22.99/x - Step 3: Cross multiply
77.10x = 115.65 × 22.99 - Step 4: Simplify right side
77.10x = 2,658.97 - Step 5: Solve for x
x = 2,658.97/77.10 - Step 6: Final answer
x = 34.49
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.