Finding the Fourth Proportional to 1,212,372,638.70, 1,818,558,958.05 and 523,625,102.70
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Solution
The fourth proportional to 1,212,372,638.70, 1,818,558,958.05 and 523,625,102.70 is: 785,437,654.05
Step by Step Solution
- Step 1: Write the proportion equation
1,212,372,638.70 : 1,818,558,958.05 = 523,625,102.70 : x - Step 2: Convert to fraction form
1,212,372,638.70/1,818,558,958.05 = 523,625,102.70/x - Step 3: Cross multiply
1,212,372,638.70x = 1,818,558,958.05 × 523,625,102.70 - Step 4: Simplify right side
1,212,372,638.70x = 952,243,121,174,936,192 - Step 5: Solve for x
x = 952,243,121,174,936,192/1,212,372,638.70 - Step 6: Final answer
x = 785,437,654.05
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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.