Finding the Fourth Proportional to 1,328.58, 1,992.72 and 354.62
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Solution
The fourth proportional to 1,328.58, 1,992.72 and 354.62 is: 531.88
Step by Step Solution
- Step 1: Write the proportion equation
1,328.58 : 1,992.72 = 354.62 : x - Step 2: Convert to fraction form
1,328.58/1,992.72 = 354.62/x - Step 3: Cross multiply
1,328.58x = 1,992.72 × 354.62 - Step 4: Simplify right side
1,328.58x = 706,648.40 - Step 5: Solve for x
x = 706,648.40/1,328.58 - Step 6: Final answer
x = 531.88
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.