Finding the Fourth Proportional to 938,442,823.60, 1,407,664,235.40 and 721,189,742.80
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Solution
The fourth proportional to 938,442,823.60, 1,407,664,235.40 and 721,189,742.80 is: 1,081,784,614.20
Step by Step Solution
- Step 1: Write the proportion equation
938,442,823.60 : 1,407,664,235.40 = 721,189,742.80 : x - Step 2: Convert to fraction form
938,442,823.60/1,407,664,235.40 = 721,189,742.80/x - Step 3: Cross multiply
938,442,823.60x = 1,407,664,235.40 × 721,189,742.80 - Step 4: Simplify right side
938,442,823.60x = 1,015,193,007,876,884,608 - Step 5: Solve for x
x = 1,015,193,007,876,884,608/938,442,823.60 - Step 6: Final answer
x = 1,081,784,614.20
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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.