Finding the Fourth Proportional to 839,953.20, 1,259,929.80 and 278,987.70
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Solution
The fourth proportional to 839,953.20, 1,259,929.80 and 278,987.70 is: 418,481.55
Step by Step Solution
- Step 1: Write the proportion equation
839,953.20 : 1,259,929.80 = 278,987.70 : x - Step 2: Convert to fraction form
839,953.20/1,259,929.80 = 278,987.70/x - Step 3: Cross multiply
839,953.20x = 1,259,929.80 × 278,987.70 - Step 4: Simplify right side
839,953.20x = 351,504,917,063.46 - Step 5: Solve for x
x = 351,504,917,063.46/839,953.20 - Step 6: Final answer
x = 418,481.55
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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.