Finding the Fourth Proportional to 3,908,529,615.40, 5,863,644,728.70 and 1,287,887,756.20
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Solution
The fourth proportional to 3,908,529,615.40, 5,863,644,728.70 and 1,287,887,756.20 is: 1,932,111,815.92
Step by Step Solution
- Step 1: Write the proportion equation
3,908,529,615.40 : 5,863,644,728.70 = 1,287,887,756.20 : x - Step 2: Convert to fraction form
3,908,529,615.40/5,863,644,728.70 = 1,287,887,756.20/x - Step 3: Cross multiply
3,908,529,615.40x = 5,863,644,728.70 × 1,287,887,756.20 - Step 4: Simplify right side
3,908,529,615.40x = 7,551,716,252,799,400,960 - Step 5: Solve for x
x = 7,551,716,252,799,400,960/3,908,529,615.40 - Step 6: Final answer
x = 1,932,111,815.92
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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.