Finding the Fourth Proportional to 919,554,416.70, 1,379,331,625.05 and 819,785,226.30
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Solution
The fourth proportional to 919,554,416.70, 1,379,331,625.05 and 819,785,226.30 is: 1,229,677,839.45
Step by Step Solution
- Step 1: Write the proportion equation
919,554,416.70 : 1,379,331,625.05 = 819,785,226.30 : x - Step 2: Convert to fraction form
919,554,416.70/1,379,331,625.05 = 819,785,226.30/x - Step 3: Cross multiply
919,554,416.70x = 1,379,331,625.05 × 819,785,226.30 - Step 4: Simplify right side
919,554,416.70x = 1,130,755,688,384,360,832 - Step 5: Solve for x
x = 1,130,755,688,384,360,832/919,554,416.70 - Step 6: Final answer
x = 1,229,677,839.45
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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.