Finding the Fourth Proportional to 39.35, 53.94 and 38.66
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Solution
The fourth proportional to 39.35, 53.94 and 38.66 is: 52.99
Step by Step Solution
- Step 1: Write the proportion equation
39.35 : 53.94 = 38.66 : x - Step 2: Convert to fraction form
39.35/53.94 = 38.66/x - Step 3: Cross multiply
39.35x = 53.94 × 38.66 - Step 4: Simplify right side
39.35x = 2,085.05 - Step 5: Solve for x
x = 2,085.05/39.35 - Step 6: Final answer
x = 52.99
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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.