Finding the Fourth Proportional to 1,990,656,858.60, 2,985,985,287.90 and 971,440,986.60
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Solution
The fourth proportional to 1,990,656,858.60, 2,985,985,287.90 and 971,440,986.60 is: 1,457,161,479.90
Step by Step Solution
- Step 1: Write the proportion equation
1,990,656,858.60 : 2,985,985,287.90 = 971,440,986.60 : x - Step 2: Convert to fraction form
1,990,656,858.60/2,985,985,287.90 = 971,440,986.60/x - Step 3: Cross multiply
1,990,656,858.60x = 2,985,985,287.90 × 971,440,986.60 - Step 4: Simplify right side
1,990,656,858.60x = 2,900,708,494,050,661,376 - Step 5: Solve for x
x = 2,900,708,494,050,661,376/1,990,656,858.60 - Step 6: Final answer
x = 1,457,161,479.90
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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.