Finding the Fourth Proportional to 642,433.20, 963,107.91 and 405,253.05
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Solution
The fourth proportional to 642,433.20, 963,107.91 and 405,253.05 is: 607,537.75
Step by Step Solution
- Step 1: Write the proportion equation
642,433.20 : 963,107.91 = 405,253.05 : x - Step 2: Convert to fraction form
642,433.20/963,107.91 = 405,253.05/x - Step 3: Cross multiply
642,433.20x = 963,107.91 × 405,253.05 - Step 4: Simplify right side
642,433.20x = 390,302,418,006.63 - Step 5: Solve for x
x = 390,302,418,006.63/642,433.20 - Step 6: Final answer
x = 607,537.75
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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.