Finding the Fourth Proportional to 381,616.80, 571,935.60 and 213,136.80
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Solution
The fourth proportional to 381,616.80, 571,935.60 and 213,136.80 is: 319,431.75
Step by Step Solution
- Step 1: Write the proportion equation
381,616.80 : 571,935.60 = 213,136.80 : x - Step 2: Convert to fraction form
381,616.80/571,935.60 = 213,136.80/x - Step 3: Cross multiply
381,616.80x = 571,935.60 × 213,136.80 - Step 4: Simplify right side
381,616.80x = 121,900,523,590.08 - Step 5: Solve for x
x = 121,900,523,590.08/381,616.80 - Step 6: Final answer
x = 319,431.75
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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.