Finding the Fourth Proportional to 318.51, 439.20 and 207.99
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Solution
The fourth proportional to 318.51, 439.20 and 207.99 is: 286.80
Step by Step Solution
- Step 1: Write the proportion equation
318.51 : 439.20 = 207.99 : x - Step 2: Convert to fraction form
318.51/439.20 = 207.99/x - Step 3: Cross multiply
318.51x = 439.20 × 207.99 - Step 4: Simplify right side
318.51x = 91,349.21 - Step 5: Solve for x
x = 91,349.21/318.51 - Step 6: Final answer
x = 286.80
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.