Finding the Fourth Proportional to 393.18, 542.99 and 323.93
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Solution
The fourth proportional to 393.18, 542.99 and 323.93 is: 447.34
Step by Step Solution
- Step 1: Write the proportion equation
393.18 : 542.99 = 323.93 : x - Step 2: Convert to fraction form
393.18/542.99 = 323.93/x - Step 3: Cross multiply
393.18x = 542.99 × 323.93 - Step 4: Simplify right side
393.18x = 175,887.77 - Step 5: Solve for x
x = 175,887.77/393.18 - Step 6: Final answer
x = 447.34
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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.