Finding the Fourth Proportional to 393.70, 587.11 and 345.18
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Solution
The fourth proportional to 393.70, 587.11 and 345.18 is: 514.75
Step by Step Solution
- Step 1: Write the proportion equation
393.70 : 587.11 = 345.18 : x - Step 2: Convert to fraction form
393.70/587.11 = 345.18/x - Step 3: Cross multiply
393.70x = 587.11 × 345.18 - Step 4: Simplify right side
393.70x = 202,655.69 - Step 5: Solve for x
x = 202,655.69/393.70 - Step 6: Final answer
x = 514.75
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.