Finding the Fourth Proportional to 392.40, 540.99 and 325.76
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Solution
The fourth proportional to 392.40, 540.99 and 325.76 is: 449.12
Step by Step Solution
- Step 1: Write the proportion equation
392.40 : 540.99 = 325.76 : x - Step 2: Convert to fraction form
392.40/540.99 = 325.76/x - Step 3: Cross multiply
392.40x = 540.99 × 325.76 - Step 4: Simplify right side
392.40x = 176,232.90 - Step 5: Solve for x
x = 176,232.90/392.40 - Step 6: Final answer
x = 449.12
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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.