Finding the Fourth Proportional to 261,637.70, 392,456.55 and 209,149.70
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Solution
The fourth proportional to 261,637.70, 392,456.55 and 209,149.70 is: 313,724.55
Step by Step Solution
- Step 1: Write the proportion equation
261,637.70 : 392,456.55 = 209,149.70 : x - Step 2: Convert to fraction form
261,637.70/392,456.55 = 209,149.70/x - Step 3: Cross multiply
261,637.70x = 392,456.55 × 209,149.70 - Step 4: Simplify right side
261,637.70x = 82,082,169,695.54 - Step 5: Solve for x
x = 82,082,169,695.54/261,637.70 - Step 6: Final answer
x = 313,724.55
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Similar ratio
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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.