Finding the Fourth Proportional to 1,279,190,689.60, 1,765,288,785.36 and 692,479,825.60
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Solution
The fourth proportional to 1,279,190,689.60, 1,765,288,785.36 and 692,479,825.60 is: 955,625,209.09
Step by Step Solution
- Step 1: Write the proportion equation
1,279,190,689.60 : 1,765,288,785.36 = 692,479,825.60 : x - Step 2: Convert to fraction form
1,279,190,689.60/1,765,288,785.36 = 692,479,825.60/x - Step 3: Cross multiply
1,279,190,689.60x = 1,765,288,785.36 × 692,479,825.60 - Step 4: Simplify right side
1,279,190,689.60x = 1,222,426,870,219,728,640 - Step 5: Solve for x
x = 1,222,426,870,219,728,640/1,279,190,689.60 - Step 6: Final answer
x = 955,625,209.09
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.