Finding the Third Proportional to 155 and 398.50
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Solution
The third proportional to 155 and 398.50 is: 1,024.53
Step by Step Solution
- Step 1: Write the proportion equation
155 : 398.50 = 398.50 : x - Step 2: Convert to fraction form
155/398.50 = 398.50/x - Step 3: Cross multiply
155x = 398.50 × 398.50 - Step 4: Simplify right side
155x = 158,802.25 - Step 5: Solve for x
x = 158,802.25/155 - Step 6: Final answer
x = 1,024.53
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Why These Related Problems?
These problems maintain the same ratio (2.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.