Finding the Fourth Proportional to 1,292,858,258.40, 1,939,559,749.20 and 419,391,423.84
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Solution
The fourth proportional to 1,292,858,258.40, 1,939,559,749.20 and 419,391,423.84 is: 629,175,487.38
Step by Step Solution
- Step 1: Write the proportion equation
1,292,858,258.40 : 1,939,559,749.20 = 419,391,423.84 : x - Step 2: Convert to fraction form
1,292,858,258.40/1,939,559,749.20 = 419,391,423.84/x - Step 3: Cross multiply
1,292,858,258.40x = 1,939,559,749.20 × 419,391,423.84 - Step 4: Simplify right side
1,292,858,258.40x = 813,434,724,839,741,312 - Step 5: Solve for x
x = 813,434,724,839,741,312/1,292,858,258.40 - Step 6: Final answer
x = 629,175,487.38
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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.