Finding the Fourth Proportional to 257,949.37, 355,965.12 and 143,222.05
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Solution
The fourth proportional to 257,949.37, 355,965.12 and 143,222.05 is: 197,643.65
Step by Step Solution
- Step 1: Write the proportion equation
257,949.37 : 355,965.12 = 143,222.05 : x - Step 2: Convert to fraction form
257,949.37/355,965.12 = 143,222.05/x - Step 3: Cross multiply
257,949.37x = 355,965.12 × 143,222.05 - Step 4: Simplify right side
257,949.37x = 50,982,053,324.98 - Step 5: Solve for x
x = 50,982,053,324.98/257,949.37 - Step 6: Final answer
x = 197,643.65
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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.