Finding the Fourth Proportional to 667,442.09, 920,815.83 and 493,430.13
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Solution
The fourth proportional to 667,442.09, 920,815.83 and 493,430.13 is: 680,745.62
Step by Step Solution
- Step 1: Write the proportion equation
667,442.09 : 920,815.83 = 493,430.13 : x - Step 2: Convert to fraction form
667,442.09/920,815.83 = 493,430.13/x - Step 3: Cross multiply
667,442.09x = 920,815.83 × 493,430.13 - Step 4: Simplify right side
667,442.09x = 454,358,274,702.96 - Step 5: Solve for x
x = 454,358,274,702.96/667,442.09 - Step 6: Final answer
x = 680,745.62
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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.