Finding the Fourth Proportional to 866,136,331.80, 1,299,204,497.70 and 815,117,995.80
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Solution
The fourth proportional to 866,136,331.80, 1,299,204,497.70 and 815,117,995.80 is: 1,222,676,993.70
Step by Step Solution
- Step 1: Write the proportion equation
866,136,331.80 : 1,299,204,497.70 = 815,117,995.80 : x - Step 2: Convert to fraction form
866,136,331.80/1,299,204,497.70 = 815,117,995.80/x - Step 3: Cross multiply
866,136,331.80x = 1,299,204,497.70 × 815,117,995.80 - Step 4: Simplify right side
866,136,331.80x = 1,059,004,966,299,569,664 - Step 5: Solve for x
x = 1,059,004,966,299,569,664/866,136,331.80 - Step 6: Final answer
x = 1,222,676,993.70
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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.