Finding the Fourth Proportional to 207.29, 310.93 and 85.55
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Solution
The fourth proportional to 207.29, 310.93 and 85.55 is: 128.32
Step by Step Solution
- Step 1: Write the proportion equation
207.29 : 310.93 = 85.55 : x - Step 2: Convert to fraction form
207.29/310.93 = 85.55/x - Step 3: Cross multiply
207.29x = 310.93 × 85.55 - Step 4: Simplify right side
207.29x = 26,598.08 - Step 5: Solve for x
x = 26,598.08/207.29 - Step 6: Final answer
x = 128.32
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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.