Finding the Fourth Proportional to 257.96, 386.97 and 121.01
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Solution
The fourth proportional to 257.96, 386.97 and 121.01 is: 181.53
Step by Step Solution
- Step 1: Write the proportion equation
257.96 : 386.97 = 121.01 : x - Step 2: Convert to fraction form
257.96/386.97 = 121.01/x - Step 3: Cross multiply
257.96x = 386.97 × 121.01 - Step 4: Simplify right side
257.96x = 46,827.24 - Step 5: Solve for x
x = 46,827.24/257.96 - Step 6: Final answer
x = 181.53
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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.