Finding the Fourth Proportional to 855,479,939.20, 1,283,219,908.80 and 310,239,260.80
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Solution
The fourth proportional to 855,479,939.20, 1,283,219,908.80 and 310,239,260.80 is: 465,358,891.20
Step by Step Solution
- Step 1: Write the proportion equation
855,479,939.20 : 1,283,219,908.80 = 310,239,260.80 : x - Step 2: Convert to fraction form
855,479,939.20/1,283,219,908.80 = 310,239,260.80/x - Step 3: Cross multiply
855,479,939.20x = 1,283,219,908.80 × 310,239,260.80 - Step 4: Simplify right side
855,479,939.20x = 398,105,195,949,955,392 - Step 5: Solve for x
x = 398,105,195,949,955,392/855,479,939.20 - Step 6: Final answer
x = 465,358,891.20
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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.