Finding the Fourth Proportional to 1,290,816,204.80, 1,936,224,307.20 and 417,415,884.80
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Solution
The fourth proportional to 1,290,816,204.80, 1,936,224,307.20 and 417,415,884.80 is: 626,123,827.20
Step by Step Solution
- Step 1: Write the proportion equation
1,290,816,204.80 : 1,936,224,307.20 = 417,415,884.80 : x - Step 2: Convert to fraction form
1,290,816,204.80/1,936,224,307.20 = 417,415,884.80/x - Step 3: Cross multiply
1,290,816,204.80x = 1,936,224,307.20 × 417,415,884.80 - Step 4: Simplify right side
1,290,816,204.80x = 808,210,782,361,155,072 - Step 5: Solve for x
x = 808,210,782,361,155,072/1,290,816,204.80 - Step 6: Final answer
x = 626,123,827.20
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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.