Finding the Fourth Proportional to 643,538.80, 888,212.76 and 371,650.96
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Solution
The fourth proportional to 643,538.80, 888,212.76 and 371,650.96 is: 512,952.95
Step by Step Solution
- Step 1: Write the proportion equation
643,538.80 : 888,212.76 = 371,650.96 : x - Step 2: Convert to fraction form
643,538.80/888,212.76 = 371,650.96/x - Step 3: Cross multiply
643,538.80x = 888,212.76 × 371,650.96 - Step 4: Simplify right side
643,538.80x = 330,105,124,938.25 - Step 5: Solve for x
x = 330,105,124,938.25/643,538.80 - Step 6: Final answer
x = 512,952.95
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1.5x scale
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.