Finding the Fourth Proportional to 489.49, 673.84 and 378.92
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Solution
The fourth proportional to 489.49, 673.84 and 378.92 is: 521.63
Step by Step Solution
- Step 1: Write the proportion equation
489.49 : 673.84 = 378.92 : x - Step 2: Convert to fraction form
489.49/673.84 = 378.92/x - Step 3: Cross multiply
489.49x = 673.84 × 378.92 - Step 4: Simplify right side
489.49x = 255,332.19 - Step 5: Solve for x
x = 255,332.19/489.49 - Step 6: Final answer
x = 521.63
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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.