Finding the Fourth Proportional to 420,914.21, 579,680.75 and 393,898.68
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Solution
The fourth proportional to 420,914.21, 579,680.75 and 393,898.68 is: 542,475.12
Step by Step Solution
- Step 1: Write the proportion equation
420,914.21 : 579,680.75 = 393,898.68 : x - Step 2: Convert to fraction form
420,914.21/579,680.75 = 393,898.68/x - Step 3: Cross multiply
420,914.21x = 579,680.75 × 393,898.68 - Step 4: Simplify right side
420,914.21x = 228,335,483,231.16 - Step 5: Solve for x
x = 228,335,483,231.16/420,914.21 - Step 6: Final answer
x = 542,475.12
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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.