Finding the Fourth Proportional to 800,814,664.20, 1,201,221,996.30 and 628,821,985.80
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Solution
The fourth proportional to 800,814,664.20, 1,201,221,996.30 and 628,821,985.80 is: 943,232,978.70
Step by Step Solution
- Step 1: Write the proportion equation
800,814,664.20 : 1,201,221,996.30 = 628,821,985.80 : x - Step 2: Convert to fraction form
800,814,664.20/1,201,221,996.30 = 628,821,985.80/x - Step 3: Cross multiply
800,814,664.20x = 1,201,221,996.30 × 628,821,985.80 - Step 4: Simplify right side
800,814,664.20x = 755,354,801,100,006,144 - Step 5: Solve for x
x = 755,354,801,100,006,144/800,814,664.20 - Step 6: Final answer
x = 943,232,978.70
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Similar ratio
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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.