Finding the Third Proportional to 139 and 261.50
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Solution
The third proportional to 139 and 261.50 is: 491.96
Step by Step Solution
- Step 1: Write the proportion equation
139 : 261.50 = 261.50 : x - Step 2: Convert to fraction form
139/261.50 = 261.50/x - Step 3: Cross multiply
139x = 261.50 × 261.50 - Step 4: Simplify right side
139x = 68,382.25 - Step 5: Solve for x
x = 68,382.25/139 - Step 6: Final answer
x = 491.96
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Why These Related Problems?
These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.