Finding the Fourth Proportional to 386.55, 580.13 and 340.99
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Solution
The fourth proportional to 386.55, 580.13 and 340.99 is: 511.75
Step by Step Solution
- Step 1: Write the proportion equation
386.55 : 580.13 = 340.99 : x - Step 2: Convert to fraction form
386.55/580.13 = 340.99/x - Step 3: Cross multiply
386.55x = 580.13 × 340.99 - Step 4: Simplify right side
386.55x = 197,818.53 - Step 5: Solve for x
x = 197,818.53/386.55 - Step 6: Final answer
x = 511.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.