Finding the Fourth Proportional to 818,613.12, 1,228,085.76 and 257,517.12
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Solution
The fourth proportional to 818,613.12, 1,228,085.76 and 257,517.12 is: 386,327.93
Step by Step Solution
- Step 1: Write the proportion equation
818,613.12 : 1,228,085.76 = 257,517.12 : x - Step 2: Convert to fraction form
818,613.12/1,228,085.76 = 257,517.12/x - Step 3: Cross multiply
818,613.12x = 1,228,085.76 × 257,517.12 - Step 4: Simplify right side
818,613.12x = 316,253,108,028.21 - Step 5: Solve for x
x = 316,253,108,028.21/818,613.12 - Step 6: Final answer
x = 386,327.93
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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.