Finding the Fourth Proportional to 4,920,781.70, 7,372,315.20 and 4,212,193.70
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Solution
The fourth proportional to 4,920,781.70, 7,372,315.20 and 4,212,193.70 is: 6,310,708.65
Step by Step Solution
- Step 1: Write the proportion equation
4,920,781.70 : 7,372,315.20 = 4,212,193.70 : x - Step 2: Convert to fraction form
4,920,781.70/7,372,315.20 = 4,212,193.70/x - Step 3: Cross multiply
4,920,781.70x = 7,372,315.20 × 4,212,193.70 - Step 4: Simplify right side
4,920,781.70x = 31,053,619,639,854.24 - Step 5: Solve for x
x = 31,053,619,639,854.24/4,920,781.70 - Step 6: Final answer
x = 6,310,708.65
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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.