Finding the Fourth Proportional to 209.51, 288.93 and 135.79
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Solution
The fourth proportional to 209.51, 288.93 and 135.79 is: 187.26
Step by Step Solution
- Step 1: Write the proportion equation
209.51 : 288.93 = 135.79 : x - Step 2: Convert to fraction form
209.51/288.93 = 135.79/x - Step 3: Cross multiply
209.51x = 288.93 × 135.79 - Step 4: Simplify right side
209.51x = 39,233.13 - Step 5: Solve for x
x = 39,233.13/209.51 - Step 6: Final answer
x = 187.26
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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.