Finding the Fourth Proportional to 425,873,404.80, 638,810,107.20 and 280,471,147.20
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Solution
The fourth proportional to 425,873,404.80, 638,810,107.20 and 280,471,147.20 is: 420,706,720.80
Step by Step Solution
- Step 1: Write the proportion equation
425,873,404.80 : 638,810,107.20 = 280,471,147.20 : x - Step 2: Convert to fraction form
425,873,404.80/638,810,107.20 = 280,471,147.20/x - Step 3: Cross multiply
425,873,404.80x = 638,810,107.20 × 280,471,147.20 - Step 4: Simplify right side
425,873,404.80x = 179,167,803,609,338,976 - Step 5: Solve for x
x = 179,167,803,609,338,976/425,873,404.80 - Step 6: Final answer
x = 420,706,720.80
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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.