Finding the Fourth Proportional to 261,637.20, 392,455.80 and 209,149.20
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Solution
The fourth proportional to 261,637.20, 392,455.80 and 209,149.20 is: 313,723.80
Step by Step Solution
- Step 1: Write the proportion equation
261,637.20 : 392,455.80 = 209,149.20 : x - Step 2: Convert to fraction form
261,637.20/392,455.80 = 209,149.20/x - Step 3: Cross multiply
261,637.20x = 392,455.80 × 209,149.20 - Step 4: Simplify right side
261,637.20x = 82,081,816,605.36 - Step 5: Solve for x
x = 82,081,816,605.36/261,637.20 - Step 6: Final answer
x = 313,723.80
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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.