Finding the Fourth Proportional to 257.85, 386.55 and 135.99
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Solution
The fourth proportional to 257.85, 386.55 and 135.99 is: 203.87
Step by Step Solution
- Step 1: Write the proportion equation
257.85 : 386.55 = 135.99 : x - Step 2: Convert to fraction form
257.85/386.55 = 135.99/x - Step 3: Cross multiply
257.85x = 386.55 × 135.99 - Step 4: Simplify right side
257.85x = 52,566.93 - Step 5: Solve for x
x = 52,566.93/257.85 - Step 6: Final answer
x = 203.87
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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.