Finding the Fourth Proportional to 388.94, 536.42 and 257.99
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Solution
The fourth proportional to 388.94, 536.42 and 257.99 is: 355.82
Step by Step Solution
- Step 1: Write the proportion equation
388.94 : 536.42 = 257.99 : x - Step 2: Convert to fraction form
388.94/536.42 = 257.99/x - Step 3: Cross multiply
388.94x = 536.42 × 257.99 - Step 4: Simplify right side
388.94x = 138,388.96 - Step 5: Solve for x
x = 138,388.96/388.94 - Step 6: Final answer
x = 355.82
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.