Finding the Fourth Proportional to 261,908.20, 392,862.30 and 74,919.70
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Solution
The fourth proportional to 261,908.20, 392,862.30 and 74,919.70 is: 112,379.55
Step by Step Solution
- Step 1: Write the proportion equation
261,908.20 : 392,862.30 = 74,919.70 : x - Step 2: Convert to fraction form
261,908.20/392,862.30 = 74,919.70/x - Step 3: Cross multiply
261,908.20x = 392,862.30 × 74,919.70 - Step 4: Simplify right side
261,908.20x = 29,433,125,657.31 - Step 5: Solve for x
x = 29,433,125,657.31/261,908.20 - Step 6: Final answer
x = 112,379.55
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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.