Finding the Fourth Proportional to 813,888,939.60, 1,220,833,409.40 and 782,144,197.20
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Solution
The fourth proportional to 813,888,939.60, 1,220,833,409.40 and 782,144,197.20 is: 1,173,216,295.80
Step by Step Solution
- Step 1: Write the proportion equation
813,888,939.60 : 1,220,833,409.40 = 782,144,197.20 : x - Step 2: Convert to fraction form
813,888,939.60/1,220,833,409.40 = 782,144,197.20/x - Step 3: Cross multiply
813,888,939.60x = 1,220,833,409.40 × 782,144,197.20 - Step 4: Simplify right side
813,888,939.60x = 954,867,766,910,102,016 - Step 5: Solve for x
x = 954,867,766,910,102,016/813,888,939.60 - Step 6: Final answer
x = 1,173,216,295.80
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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.