Finding the Fourth Proportional to 1,225,971,361.48, 1,691,876,346.90 and 669,090,126.28
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Solution
The fourth proportional to 1,225,971,361.48, 1,691,876,346.90 and 669,090,126.28 is: 923,363,949.73
Step by Step Solution
- Step 1: Write the proportion equation
1,225,971,361.48 : 1,691,876,346.90 = 669,090,126.28 : x - Step 2: Convert to fraction form
1,225,971,361.48/1,691,876,346.90 = 669,090,126.28/x - Step 3: Cross multiply
1,225,971,361.48x = 1,691,876,346.90 × 669,090,126.28 - Step 4: Simplify right side
1,225,971,361.48x = 1,132,017,758,597,466,112 - Step 5: Solve for x
x = 1,132,017,758,597,466,112/1,225,971,361.48 - Step 6: Final answer
x = 923,363,949.73
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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.