Finding the Fourth Proportional to 257.64, 386.70 and 135.99
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Solution
The fourth proportional to 257.64, 386.70 and 135.99 is: 204.11
Step by Step Solution
- Step 1: Write the proportion equation
257.64 : 386.70 = 135.99 : x - Step 2: Convert to fraction form
257.64/386.70 = 135.99/x - Step 3: Cross multiply
257.64x = 386.70 × 135.99 - Step 4: Simplify right side
257.64x = 52,587.33 - Step 5: Solve for x
x = 52,587.33/257.64 - Step 6: Final answer
x = 204.11
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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.