Finding the Fourth Proportional to 210.20, 290.09 and 115.68
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Solution
The fourth proportional to 210.20, 290.09 and 115.68 is: 159.64
Step by Step Solution
- Step 1: Write the proportion equation
210.20 : 290.09 = 115.68 : x - Step 2: Convert to fraction form
210.20/290.09 = 115.68/x - Step 3: Cross multiply
210.20x = 290.09 × 115.68 - Step 4: Simplify right side
210.20x = 33,555.94 - Step 5: Solve for x
x = 33,555.94/210.20 - Step 6: Final answer
x = 159.64
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.