Finding the Fourth Proportional to 257.16, 385.37 and 102.99
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Solution
The fourth proportional to 257.16, 385.37 and 102.99 is: 154.34
Step by Step Solution
- Step 1: Write the proportion equation
257.16 : 385.37 = 102.99 : x - Step 2: Convert to fraction form
257.16/385.37 = 102.99/x - Step 3: Cross multiply
257.16x = 385.37 × 102.99 - Step 4: Simplify right side
257.16x = 39,689.26 - Step 5: Solve for x
x = 39,689.26/257.16 - Step 6: Final answer
x = 154.34
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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.