Finding the Fourth Proportional to 280,020.93, 420,171.48 and 128,217.67
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Solution
The fourth proportional to 280,020.93, 420,171.48 and 128,217.67 is: 192,390.65
Step by Step Solution
- Step 1: Write the proportion equation
280,020.93 : 420,171.48 = 128,217.67 : x - Step 2: Convert to fraction form
280,020.93/420,171.48 = 128,217.67/x - Step 3: Cross multiply
280,020.93x = 420,171.48 × 128,217.67 - Step 4: Simplify right side
280,020.93x = 53,873,408,166.05 - Step 5: Solve for x
x = 53,873,408,166.05/280,020.93 - Step 6: Final answer
x = 192,390.65
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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.