Finding the Fourth Proportional to 426,492,394.20, 639,738,591.30 and 278,539,219.80
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Solution
The fourth proportional to 426,492,394.20, 639,738,591.30 and 278,539,219.80 is: 417,808,829.70
Step by Step Solution
- Step 1: Write the proportion equation
426,492,394.20 : 639,738,591.30 = 278,539,219.80 : x - Step 2: Convert to fraction form
426,492,394.20/639,738,591.30 = 278,539,219.80/x - Step 3: Cross multiply
426,492,394.20x = 639,738,591.30 × 278,539,219.80 - Step 4: Simplify right side
426,492,394.20x = 178,192,288,096,653,056 - Step 5: Solve for x
x = 178,192,288,096,653,056/426,492,394.20 - Step 6: Final answer
x = 417,808,829.70
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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.