Finding the Fourth Proportional to 420,311.68, 629,638.08 and 315,249.28
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Solution
The fourth proportional to 420,311.68, 629,638.08 and 315,249.28 is: 472,251.81
Step by Step Solution
- Step 1: Write the proportion equation
420,311.68 : 629,638.08 = 315,249.28 : x - Step 2: Convert to fraction form
420,311.68/629,638.08 = 315,249.28/x - Step 3: Cross multiply
420,311.68x = 629,638.08 × 315,249.28 - Step 4: Simplify right side
420,311.68x = 198,492,951,380.58 - Step 5: Solve for x
x = 198,492,951,380.58/420,311.68 - Step 6: Final answer
x = 472,251.81
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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.