Finding the Fourth Proportional to 1,392,305,121.64, 1,921,435,887.54 and 765,831,841.84
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Solution
The fourth proportional to 1,392,305,121.64, 1,921,435,887.54 and 765,831,841.84 is: 1,056,878,095.08
Step by Step Solution
- Step 1: Write the proportion equation
1,392,305,121.64 : 1,921,435,887.54 = 765,831,841.84 : x - Step 2: Convert to fraction form
1,392,305,121.64/1,921,435,887.54 = 765,831,841.84/x - Step 3: Cross multiply
1,392,305,121.64x = 1,921,435,887.54 × 765,831,841.84 - Step 4: Simplify right side
1,392,305,121.64x = 1,471,496,784,732,233,216 - Step 5: Solve for x
x = 1,471,496,784,732,233,216/1,392,305,121.64 - Step 6: Final answer
x = 1,056,878,095.08
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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.