Finding the Fourth Proportional to 427,391,966.40, 640,875,664.56 and 136,221,201.60
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Solution
The fourth proportional to 427,391,966.40, 640,875,664.56 and 136,221,201.60 is: 204,264,141.50
Step by Step Solution
- Step 1: Write the proportion equation
427,391,966.40 : 640,875,664.56 = 136,221,201.60 : x - Step 2: Convert to fraction form
427,391,966.40/640,875,664.56 = 136,221,201.60/x - Step 3: Cross multiply
427,391,966.40x = 640,875,664.56 × 136,221,201.60 - Step 4: Simplify right side
427,391,966.40x = 87,300,853,102,561,728 - Step 5: Solve for x
x = 87,300,853,102,561,728/427,391,966.40 - Step 6: Final answer
x = 204,264,141.50
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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.