Finding the Fourth Proportional to 858,707.11, 1,288,154.07 and 318,900.06
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Solution
The fourth proportional to 858,707.11, 1,288,154.07 and 318,900.06 is: 478,384.78
Step by Step Solution
- Step 1: Write the proportion equation
858,707.11 : 1,288,154.07 = 318,900.06 : x - Step 2: Convert to fraction form
858,707.11/1,288,154.07 = 318,900.06/x - Step 3: Cross multiply
858,707.11x = 1,288,154.07 × 318,900.06 - Step 4: Simplify right side
858,707.11x = 410,792,410,212.24 - Step 5: Solve for x
x = 410,792,410,212.24/858,707.11 - Step 6: Final answer
x = 478,384.78
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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.