Finding the Fourth Proportional to 257,471.36, 386,329.92 and 91,337.60
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Solution
The fourth proportional to 257,471.36, 386,329.92 and 91,337.60 is: 137,049.99
Step by Step Solution
- Step 1: Write the proportion equation
257,471.36 : 386,329.92 = 91,337.60 : x - Step 2: Convert to fraction form
257,471.36/386,329.92 = 91,337.60/x - Step 3: Cross multiply
257,471.36x = 386,329.92 × 91,337.60 - Step 4: Simplify right side
257,471.36x = 35,286,447,700.99 - Step 5: Solve for x
x = 35,286,447,700.99/257,471.36 - Step 6: Final answer
x = 137,049.99
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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.