Finding the Fourth Proportional to 647,519.80, 971,717.10 and 422,331.70
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Solution
The fourth proportional to 647,519.80, 971,717.10 and 422,331.70 is: 633,782.84
Step by Step Solution
- Step 1: Write the proportion equation
647,519.80 : 971,717.10 = 422,331.70 : x - Step 2: Convert to fraction form
647,519.80/971,717.10 = 422,331.70/x - Step 3: Cross multiply
647,519.80x = 971,717.10 × 422,331.70 - Step 4: Simplify right side
647,519.80x = 410,386,934,762.07 - Step 5: Solve for x
x = 410,386,934,762.07/647,519.80 - Step 6: Final answer
x = 633,782.84
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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.