Finding the Fourth Proportional to 207.28, 310.92 and 79
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Solution
The fourth proportional to 207.28, 310.92 and 79 is: 118.50
Step by Step Solution
- Step 1: Write the proportion equation
207.28 : 310.92 = 79 : x - Step 2: Convert to fraction form
207.28/310.92 = 79/x - Step 3: Cross multiply
207.28x = 310.92 × 79 - Step 4: Simplify right side
207.28x = 24,562.68 - Step 5: Solve for x
x = 24,562.68/207.28 - Step 6: Final answer
x = 118.50
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.