Finding the Fourth Proportional to 855,479,931.20, 1,283,219,896.80 and 310,239,252.80
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Solution
The fourth proportional to 855,479,931.20, 1,283,219,896.80 and 310,239,252.80 is: 465,358,879.20
Step by Step Solution
- Step 1: Write the proportion equation
855,479,931.20 : 1,283,219,896.80 = 310,239,252.80 : x - Step 2: Convert to fraction form
855,479,931.20/1,283,219,896.80 = 310,239,252.80/x - Step 3: Cross multiply
855,479,931.20x = 1,283,219,896.80 × 310,239,252.80 - Step 4: Simplify right side
855,479,931.20x = 398,105,181,961,325,120 - Step 5: Solve for x
x = 398,105,181,961,325,120/855,479,931.20 - Step 6: Final answer
x = 465,358,879.20
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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.