Finding the Fourth Proportional to 1,212,372,640.70, 1,818,558,961.05 and 523,625,104.70
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Solution
The fourth proportional to 1,212,372,640.70, 1,818,558,961.05 and 523,625,104.70 is: 785,437,657.05
Step by Step Solution
- Step 1: Write the proportion equation
1,212,372,640.70 : 1,818,558,961.05 = 523,625,104.70 : x - Step 2: Convert to fraction form
1,212,372,640.70/1,818,558,961.05 = 523,625,104.70/x - Step 3: Cross multiply
1,212,372,640.70x = 1,818,558,961.05 × 523,625,104.70 - Step 4: Simplify right side
1,212,372,640.70x = 952,243,126,382,929,408 - Step 5: Solve for x
x = 952,243,126,382,929,408/1,212,372,640.70 - Step 6: Final answer
x = 785,437,657.05
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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.