Finding the Fourth Proportional to 259,747.80, 389,621.70 and 206,603.70
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Solution
The fourth proportional to 259,747.80, 389,621.70 and 206,603.70 is: 309,905.55
Step by Step Solution
- Step 1: Write the proportion equation
259,747.80 : 389,621.70 = 206,603.70 : x - Step 2: Convert to fraction form
259,747.80/389,621.70 = 206,603.70/x - Step 3: Cross multiply
259,747.80x = 389,621.70 × 206,603.70 - Step 4: Simplify right side
259,747.80x = 80,497,284,820.29 - Step 5: Solve for x
x = 80,497,284,820.29/259,747.80 - Step 6: Final answer
x = 309,905.55
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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.