Finding the Fourth Proportional to 210.70, 290.79 and 136.99
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Solution
The fourth proportional to 210.70, 290.79 and 136.99 is: 189.06
Step by Step Solution
- Step 1: Write the proportion equation
210.70 : 290.79 = 136.99 : x - Step 2: Convert to fraction form
210.70/290.79 = 136.99/x - Step 3: Cross multiply
210.70x = 290.79 × 136.99 - Step 4: Simplify right side
210.70x = 39,835.69 - Step 5: Solve for x
x = 39,835.69/210.70 - Step 6: Final answer
x = 189.06
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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.