Finding the Fourth Proportional to 393,416,906.21, 542,962,939.42 and 223,912,358.79
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Solution
The fourth proportional to 393,416,906.21, 542,962,939.42 and 223,912,358.79 is: 309,026,151.60
Step by Step Solution
- Step 1: Write the proportion equation
393,416,906.21 : 542,962,939.42 = 223,912,358.79 : x - Step 2: Convert to fraction form
393,416,906.21/542,962,939.42 = 223,912,358.79/x - Step 3: Cross multiply
393,416,906.21x = 542,962,939.42 × 223,912,358.79 - Step 4: Simplify right side
393,416,906.21x = 121,576,112,501,084,064 - Step 5: Solve for x
x = 121,576,112,501,084,064/393,416,906.21 - Step 6: Final answer
x = 309,026,151.60
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.