Finding the Fourth Proportional to 218.07, 324.87 and 207.75
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Solution
The fourth proportional to 218.07, 324.87 and 207.75 is: 309.50
Step by Step Solution
- Step 1: Write the proportion equation
218.07 : 324.87 = 207.75 : x - Step 2: Convert to fraction form
218.07/324.87 = 207.75/x - Step 3: Cross multiply
218.07x = 324.87 × 207.75 - Step 4: Simplify right side
218.07x = 67,491.74 - Step 5: Solve for x
x = 67,491.74/218.07 - Step 6: Final answer
x = 309.50
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.