Finding the Fourth Proportional to 393.70, 543.14 and 253.79
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Solution
The fourth proportional to 393.70, 543.14 and 253.79 is: 350.12
Step by Step Solution
- Step 1: Write the proportion equation
393.70 : 543.14 = 253.79 : x - Step 2: Convert to fraction form
393.70/543.14 = 253.79/x - Step 3: Cross multiply
393.70x = 543.14 × 253.79 - Step 4: Simplify right side
393.70x = 137,841.42 - Step 5: Solve for x
x = 137,841.42/393.70 - Step 6: Final answer
x = 350.12
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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.