Finding the Fourth Proportional to 318.55, 439.38 and 207.99
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Solution
The fourth proportional to 318.55, 439.38 and 207.99 is: 286.88
Step by Step Solution
- Step 1: Write the proportion equation
318.55 : 439.38 = 207.99 : x - Step 2: Convert to fraction form
318.55/439.38 = 207.99/x - Step 3: Cross multiply
318.55x = 439.38 × 207.99 - Step 4: Simplify right side
318.55x = 91,386.65 - Step 5: Solve for x
x = 91,386.65/318.55 - Step 6: Final answer
x = 286.88
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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.