Finding the Fourth Proportional to 207.30, 285.97 and 129.63
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Solution
The fourth proportional to 207.30, 285.97 and 129.63 is: 178.82
Step by Step Solution
- Step 1: Write the proportion equation
207.30 : 285.97 = 129.63 : x - Step 2: Convert to fraction form
207.30/285.97 = 129.63/x - Step 3: Cross multiply
207.30x = 285.97 × 129.63 - Step 4: Simplify right side
207.30x = 37,070.29 - Step 5: Solve for x
x = 37,070.29/207.30 - Step 6: Final answer
x = 178.82
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.