Finding the Fourth Proportional to 1,323,649,615.20, 1,985,474,422.80 and 354,301,231.20
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Solution
The fourth proportional to 1,323,649,615.20, 1,985,474,422.80 and 354,301,231.20 is: 531,451,846.80
Step by Step Solution
- Step 1: Write the proportion equation
1,323,649,615.20 : 1,985,474,422.80 = 354,301,231.20 : x - Step 2: Convert to fraction form
1,323,649,615.20/1,985,474,422.80 = 354,301,231.20/x - Step 3: Cross multiply
1,323,649,615.20x = 1,985,474,422.80 × 354,301,231.20 - Step 4: Simplify right side
1,323,649,615.20x = 703,456,032,514,149,248 - Step 5: Solve for x
x = 703,456,032,514,149,248/1,323,649,615.20 - Step 6: Final answer
x = 531,451,846.80
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Double scale
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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.