Finding the Fourth Proportional to 763,207.80, 1,144,811.70 and 431,431.80
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Solution
The fourth proportional to 763,207.80, 1,144,811.70 and 431,431.80 is: 647,147.70
Step by Step Solution
- Step 1: Write the proportion equation
763,207.80 : 1,144,811.70 = 431,431.80 : x - Step 2: Convert to fraction form
763,207.80/1,144,811.70 = 431,431.80/x - Step 3: Cross multiply
763,207.80x = 1,144,811.70 × 431,431.80 - Step 4: Simplify right side
763,207.80x = 493,908,172,392.06 - Step 5: Solve for x
x = 493,908,172,392.06/763,207.80 - Step 6: Final answer
x = 647,147.70
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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.