Finding the Fourth Proportional to 210.99, 291.19 and 123.66
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Solution
The fourth proportional to 210.99, 291.19 and 123.66 is: 170.66
Step by Step Solution
- Step 1: Write the proportion equation
210.99 : 291.19 = 123.66 : x - Step 2: Convert to fraction form
210.99/291.19 = 123.66/x - Step 3: Cross multiply
210.99x = 291.19 × 123.66 - Step 4: Simplify right side
210.99x = 36,008.25 - Step 5: Solve for x
x = 36,008.25/210.99 - Step 6: Final answer
x = 170.66
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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.