Finding the Fourth Proportional to 280,440,000.80, 420,660,001.20 and 212,415,552.80
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Solution
The fourth proportional to 280,440,000.80, 420,660,001.20 and 212,415,552.80 is: 318,623,329.20
Step by Step Solution
- Step 1: Write the proportion equation
280,440,000.80 : 420,660,001.20 = 212,415,552.80 : x - Step 2: Convert to fraction form
280,440,000.80/420,660,001.20 = 212,415,552.80/x - Step 3: Cross multiply
280,440,000.80x = 420,660,001.20 × 212,415,552.80 - Step 4: Simplify right side
280,440,000.80x = 89,354,726,695,746,672 - Step 5: Solve for x
x = 89,354,726,695,746,672/280,440,000.80 - Step 6: Final answer
x = 318,623,329.20
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1.5x scale
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.