Finding the Fourth Proportional to 1,478,525,450.28, 2,040,381,245.70 and 818,486,750.76
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Solution
The fourth proportional to 1,478,525,450.28, 2,040,381,245.70 and 818,486,750.76 is: 1,129,520,642.20
Step by Step Solution
- Step 1: Write the proportion equation
1,478,525,450.28 : 2,040,381,245.70 = 818,486,750.76 : x - Step 2: Convert to fraction form
1,478,525,450.28/2,040,381,245.70 = 818,486,750.76/x - Step 3: Cross multiply
1,478,525,450.28x = 2,040,381,245.70 × 818,486,750.76 - Step 4: Simplify right side
1,478,525,450.28x = 1,670,025,016,104,634,368 - Step 5: Solve for x
x = 1,670,025,016,104,634,368/1,478,525,450.28 - Step 6: Final answer
x = 1,129,520,642.20
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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.