Finding the Fourth Proportional to 256.99, 385.49 and 102.99
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Solution
The fourth proportional to 256.99, 385.49 and 102.99 is: 154.49
Step by Step Solution
- Step 1: Write the proportion equation
256.99 : 385.49 = 102.99 : x - Step 2: Convert to fraction form
256.99/385.49 = 102.99/x - Step 3: Cross multiply
256.99x = 385.49 × 102.99 - Step 4: Simplify right side
256.99x = 39,701.62 - Step 5: Solve for x
x = 39,701.62/256.99 - Step 6: Final answer
x = 154.49
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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.