Finding the Fourth Proportional to 371.79, 512.51 and 319.08
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Solution
The fourth proportional to 371.79, 512.51 and 319.08 is: 439.85
Step by Step Solution
- Step 1: Write the proportion equation
371.79 : 512.51 = 319.08 : x - Step 2: Convert to fraction form
371.79/512.51 = 319.08/x - Step 3: Cross multiply
371.79x = 512.51 × 319.08 - Step 4: Simplify right side
371.79x = 163,529.13 - Step 5: Solve for x
x = 163,529.13/371.79 - Step 6: Final answer
x = 439.85
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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.