Finding the Fourth Proportional to 393.99, 543.65 and 228.23
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Solution
The fourth proportional to 393.99, 543.65 and 228.23 is: 314.92
Step by Step Solution
- Step 1: Write the proportion equation
393.99 : 543.65 = 228.23 : x - Step 2: Convert to fraction form
393.99/543.65 = 228.23/x - Step 3: Cross multiply
393.99x = 543.65 × 228.23 - Step 4: Simplify right side
393.99x = 124,077.24 - Step 5: Solve for x
x = 124,077.24/393.99 - Step 6: Final answer
x = 314.92
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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.