Finding the Fourth Proportional to 393.69, 542.67 and 282.99
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Solution
The fourth proportional to 393.69, 542.67 and 282.99 is: 390.08
Step by Step Solution
- Step 1: Write the proportion equation
393.69 : 542.67 = 282.99 : x - Step 2: Convert to fraction form
393.69/542.67 = 282.99/x - Step 3: Cross multiply
393.69x = 542.67 × 282.99 - Step 4: Simplify right side
393.69x = 153,570.18 - Step 5: Solve for x
x = 153,570.18/393.69 - Step 6: Final answer
x = 390.08
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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.