Finding the Fourth Proportional to 418.49, 627.70 and 129.93
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Solution
The fourth proportional to 418.49, 627.70 and 129.93 is: 194.88
Step by Step Solution
- Step 1: Write the proportion equation
418.49 : 627.70 = 129.93 : x - Step 2: Convert to fraction form
418.49/627.70 = 129.93/x - Step 3: Cross multiply
418.49x = 627.70 × 129.93 - Step 4: Simplify right side
418.49x = 81,557.06 - Step 5: Solve for x
x = 81,557.06/418.49 - Step 6: Final answer
x = 194.88
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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.