Finding the Fourth Proportional to 61.40, 84.69 and 38.09
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Solution
The fourth proportional to 61.40, 84.69 and 38.09 is: 52.54
Step by Step Solution
- Step 1: Write the proportion equation
61.40 : 84.69 = 38.09 : x - Step 2: Convert to fraction form
61.40/84.69 = 38.09/x - Step 3: Cross multiply
61.40x = 84.69 × 38.09 - Step 4: Simplify right side
61.40x = 3,225.42 - Step 5: Solve for x
x = 3,225.42/61.40 - Step 6: Final answer
x = 52.54
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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.