Finding the Fourth Proportional to 418.74, 628.21 and 126.24
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Solution
The fourth proportional to 418.74, 628.21 and 126.24 is: 189.39
Step by Step Solution
- Step 1: Write the proportion equation
418.74 : 628.21 = 126.24 : x - Step 2: Convert to fraction form
418.74/628.21 = 126.24/x - Step 3: Cross multiply
418.74x = 628.21 × 126.24 - Step 4: Simplify right side
418.74x = 79,305.23 - Step 5: Solve for x
x = 79,305.23/418.74 - Step 6: Final answer
x = 189.39
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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.