Finding the Fourth Proportional to 392.99, 542.40 and 227.19
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Solution
The fourth proportional to 392.99, 542.40 and 227.19 is: 313.56
Step by Step Solution
- Step 1: Write the proportion equation
392.99 : 542.40 = 227.19 : x - Step 2: Convert to fraction form
392.99/542.40 = 227.19/x - Step 3: Cross multiply
392.99x = 542.40 × 227.19 - Step 4: Simplify right side
392.99x = 123,225.99 - Step 5: Solve for x
x = 123,225.99/392.99 - Step 6: Final answer
x = 313.56
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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.