Finding the Fourth Proportional to 1,215,785,340.40, 1,677,785,204.64 and 658,868,387.48
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Solution
The fourth proportional to 1,215,785,340.40, 1,677,785,204.64 and 658,868,387.48 is: 909,239,152.33
Step by Step Solution
- Step 1: Write the proportion equation
1,215,785,340.40 : 1,677,785,204.64 = 658,868,387.48 : x - Step 2: Convert to fraction form
1,215,785,340.40/1,677,785,204.64 = 658,868,387.48/x - Step 3: Cross multiply
1,215,785,340.40x = 1,677,785,204.64 × 658,868,387.48 - Step 4: Simplify right side
1,215,785,340.40x = 1,105,439,632,318,958,720 - Step 5: Solve for x
x = 1,105,439,632,318,958,720/1,215,785,340.40 - Step 6: Final answer
x = 909,239,152.33
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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.