Finding the Fourth Proportional to 257.99, 386.94 and 84.68
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Solution
The fourth proportional to 257.99, 386.94 and 84.68 is: 127.01
Step by Step Solution
- Step 1: Write the proportion equation
257.99 : 386.94 = 84.68 : x - Step 2: Convert to fraction form
257.99/386.94 = 84.68/x - Step 3: Cross multiply
257.99x = 386.94 × 84.68 - Step 4: Simplify right side
257.99x = 32,765.91 - Step 5: Solve for x
x = 32,765.91/257.99 - Step 6: Final answer
x = 127.01
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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.