Finding the Fourth Proportional to 990, 1,366.19 and 547.88
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Solution
The fourth proportional to 990, 1,366.19 and 547.88 is: 756.07
Step by Step Solution
- Step 1: Write the proportion equation
990 : 1,366.19 = 547.88 : x - Step 2: Convert to fraction form
990/1,366.19 = 547.88/x - Step 3: Cross multiply
990x = 1,366.19 × 547.88 - Step 4: Simplify right side
990x = 748,508.18 - Step 5: Solve for x
x = 748,508.18/990 - Step 6: Final answer
x = 756.07
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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.