Finding the Fourth Proportional to 643,911.80, 965,867.70 and 328,983.80
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Solution
The fourth proportional to 643,911.80, 965,867.70 and 328,983.80 is: 493,475.70
Step by Step Solution
- Step 1: Write the proportion equation
643,911.80 : 965,867.70 = 328,983.80 : x - Step 2: Convert to fraction form
643,911.80/965,867.70 = 328,983.80/x - Step 3: Cross multiply
643,911.80x = 965,867.70 × 328,983.80 - Step 4: Simplify right side
643,911.80x = 317,754,826,243.26 - Step 5: Solve for x
x = 317,754,826,243.26/643,911.80 - Step 6: Final answer
x = 493,475.70
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1.5x scale
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.