Finding the Fourth Proportional to 256.31, 384.56 and 82.99
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Solution
The fourth proportional to 256.31, 384.56 and 82.99 is: 124.51
Step by Step Solution
- Step 1: Write the proportion equation
256.31 : 384.56 = 82.99 : x - Step 2: Convert to fraction form
256.31/384.56 = 82.99/x - Step 3: Cross multiply
256.31x = 384.56 × 82.99 - Step 4: Simplify right side
256.31x = 31,912.30 - Step 5: Solve for x
x = 31,912.30/256.31 - Step 6: Final answer
x = 124.51
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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.