Finding the Fourth Proportional to 207.55, 310.87 and 138.75
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Solution
The fourth proportional to 207.55, 310.87 and 138.75 is: 207.82
Step by Step Solution
- Step 1: Write the proportion equation
207.55 : 310.87 = 138.75 : x - Step 2: Convert to fraction form
207.55/310.87 = 138.75/x - Step 3: Cross multiply
207.55x = 310.87 × 138.75 - Step 4: Simplify right side
207.55x = 43,133.21 - Step 5: Solve for x
x = 43,133.21/207.55 - Step 6: Final answer
x = 207.82
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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.