Finding the Fourth Proportional to 1,672,137,989.36, 2,307,616,913.76 and 919,512,869.12
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Solution
The fourth proportional to 1,672,137,989.36, 2,307,616,913.76 and 919,512,869.12 is: 1,268,964,321.55
Step by Step Solution
- Step 1: Write the proportion equation
1,672,137,989.36 : 2,307,616,913.76 = 919,512,869.12 : x - Step 2: Convert to fraction form
1,672,137,989.36/2,307,616,913.76 = 919,512,869.12/x - Step 3: Cross multiply
1,672,137,989.36x = 2,307,616,913.76 × 919,512,869.12 - Step 4: Simplify right side
1,672,137,989.36x = 2,121,883,449,201,297,408 - Step 5: Solve for x
x = 2,121,883,449,201,297,408/1,672,137,989.36 - Step 6: Final answer
x = 1,268,964,321.55
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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.