Finding the Fourth Proportional to 1,420,193,873.80, 2,128,947,117.90 and 838,374,891.40
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Solution
The fourth proportional to 1,420,193,873.80, 2,128,947,117.90 and 838,374,891.40 is: 1,256,769,122.65
Step by Step Solution
- Step 1: Write the proportion equation
1,420,193,873.80 : 2,128,947,117.90 = 838,374,891.40 : x - Step 2: Convert to fraction form
1,420,193,873.80/2,128,947,117.90 = 838,374,891.40/x - Step 3: Cross multiply
1,420,193,873.80x = 2,128,947,117.90 × 838,374,891.40 - Step 4: Simplify right side
1,420,193,873.80x = 1,784,855,808,765,755,648 - Step 5: Solve for x
x = 1,784,855,808,765,755,648/1,420,193,873.80 - Step 6: Final answer
x = 1,256,769,122.65
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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.