Finding the Fourth Proportional to 318.12, 439.14 and 207.69
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Solution
The fourth proportional to 318.12, 439.14 and 207.69 is: 286.70
Step by Step Solution
- Step 1: Write the proportion equation
318.12 : 439.14 = 207.69 : x - Step 2: Convert to fraction form
318.12/439.14 = 207.69/x - Step 3: Cross multiply
318.12x = 439.14 × 207.69 - Step 4: Simplify right side
318.12x = 91,204.99 - Step 5: Solve for x
x = 91,204.99/318.12 - Step 6: Final answer
x = 286.70
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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.