Finding the Third Proportional to 128 and 245.50
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Solution
The third proportional to 128 and 245.50 is: 470.86
Step by Step Solution
- Step 1: Write the proportion equation
128 : 245.50 = 245.50 : x - Step 2: Convert to fraction form
128/245.50 = 245.50/x - Step 3: Cross multiply
128x = 245.50 × 245.50 - Step 4: Simplify right side
128x = 60,270.25 - Step 5: Solve for x
x = 60,270.25/128 - Step 6: Final answer
x = 470.86
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These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.