Finding the Fourth Proportional to 392.68, 542.09 and 245.53
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Solution
The fourth proportional to 392.68, 542.09 and 245.53 is: 338.95
Step by Step Solution
- Step 1: Write the proportion equation
392.68 : 542.09 = 245.53 : x - Step 2: Convert to fraction form
392.68/542.09 = 245.53/x - Step 3: Cross multiply
392.68x = 542.09 × 245.53 - Step 4: Simplify right side
392.68x = 133,098.13 - Step 5: Solve for x
x = 133,098.13/392.68 - Step 6: Final answer
x = 338.95
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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.