Finding the Fourth Proportional to 257.15, 385.42 and 170.99
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Solution
The fourth proportional to 257.15, 385.42 and 170.99 is: 256.28
Step by Step Solution
- Step 1: Write the proportion equation
257.15 : 385.42 = 170.99 : x - Step 2: Convert to fraction form
257.15/385.42 = 170.99/x - Step 3: Cross multiply
257.15x = 385.42 × 170.99 - Step 4: Simplify right side
257.15x = 65,902.97 - Step 5: Solve for x
x = 65,902.97/257.15 - Step 6: Final answer
x = 256.28
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.