Finding the Fourth Proportional to 207.36, 310.90 and 79
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Solution
The fourth proportional to 207.36, 310.90 and 79 is: 118.45
Step by Step Solution
- Step 1: Write the proportion equation
207.36 : 310.90 = 79 : x - Step 2: Convert to fraction form
207.36/310.90 = 79/x - Step 3: Cross multiply
207.36x = 310.90 × 79 - Step 4: Simplify right side
207.36x = 24,561.10 - Step 5: Solve for x
x = 24,561.10/207.36 - Step 6: Final answer
x = 118.45
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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.