Finding the Fourth Proportional to 780,023,687.60, 1,170,035,531.40 and 320,291,793.20
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Solution
The fourth proportional to 780,023,687.60, 1,170,035,531.40 and 320,291,793.20 is: 480,437,689.80
Step by Step Solution
- Step 1: Write the proportion equation
780,023,687.60 : 1,170,035,531.40 = 320,291,793.20 : x - Step 2: Convert to fraction form
780,023,687.60/1,170,035,531.40 = 320,291,793.20/x - Step 3: Cross multiply
780,023,687.60x = 1,170,035,531.40 × 320,291,793.20 - Step 4: Simplify right side
780,023,687.60x = 374,752,778,459,820,928 - Step 5: Solve for x
x = 374,752,778,459,820,928/780,023,687.60 - Step 6: Final answer
x = 480,437,689.80
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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.