Finding the Fourth Proportional to 210.13, 289.91 and 122.75
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Solution
The fourth proportional to 210.13, 289.91 and 122.75 is: 169.35
Step by Step Solution
- Step 1: Write the proportion equation
210.13 : 289.91 = 122.75 : x - Step 2: Convert to fraction form
210.13/289.91 = 122.75/x - Step 3: Cross multiply
210.13x = 289.91 × 122.75 - Step 4: Simplify right side
210.13x = 35,586.45 - Step 5: Solve for x
x = 35,586.45/210.13 - Step 6: Final answer
x = 169.35
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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.