Finding the Fourth Proportional to 1,238,906,221.20, 1,858,639,306.14 and 409,857,905.88
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Solution
The fourth proportional to 1,238,906,221.20, 1,858,639,306.14 and 409,857,905.88 is: 614,879,480.60
Step by Step Solution
- Step 1: Write the proportion equation
1,238,906,221.20 : 1,858,639,306.14 = 409,857,905.88 : x - Step 2: Convert to fraction form
1,238,906,221.20/1,858,639,306.14 = 409,857,905.88/x - Step 3: Cross multiply
1,238,906,221.20x = 1,858,639,306.14 × 409,857,905.88 - Step 4: Simplify right side
1,238,906,221.20x = 761,778,013,800,796,672 - Step 5: Solve for x
x = 761,778,013,800,796,672/1,238,906,221.20 - Step 6: Final answer
x = 614,879,480.60
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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.