Finding the Fourth Proportional to 680,990,911.80, 1,021,486,367.70 and 336,617,143.80
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Solution
The fourth proportional to 680,990,911.80, 1,021,486,367.70 and 336,617,143.80 is: 504,925,715.70
Step by Step Solution
- Step 1: Write the proportion equation
680,990,911.80 : 1,021,486,367.70 = 336,617,143.80 : x - Step 2: Convert to fraction form
680,990,911.80/1,021,486,367.70 = 336,617,143.80/x - Step 3: Cross multiply
680,990,911.80x = 1,021,486,367.70 × 336,617,143.80 - Step 4: Simplify right side
680,990,911.80x = 343,849,823,525,810,624 - Step 5: Solve for x
x = 343,849,823,525,810,624/680,990,911.80 - Step 6: Final answer
x = 504,925,715.70
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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.