Finding the Fourth Proportional to 420,439.95, 629,183.70 and 287,579.70
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Solution
The fourth proportional to 420,439.95, 629,183.70 and 287,579.70 is: 430,359.82
Step by Step Solution
- Step 1: Write the proportion equation
420,439.95 : 629,183.70 = 287,579.70 : x - Step 2: Convert to fraction form
420,439.95/629,183.70 = 287,579.70/x - Step 3: Cross multiply
420,439.95x = 629,183.70 × 287,579.70 - Step 4: Simplify right side
420,439.95x = 180,940,459,690.89 - Step 5: Solve for x
x = 180,940,459,690.89/420,439.95 - Step 6: Final answer
x = 430,359.82
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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.