Finding the Fourth Proportional to 990,636,699.60, 1,485,955,049.40 and 664,119,349.20
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Solution
The fourth proportional to 990,636,699.60, 1,485,955,049.40 and 664,119,349.20 is: 996,179,023.80
Step by Step Solution
- Step 1: Write the proportion equation
990,636,699.60 : 1,485,955,049.40 = 664,119,349.20 : x - Step 2: Convert to fraction form
990,636,699.60/1,485,955,049.40 = 664,119,349.20/x - Step 3: Cross multiply
990,636,699.60x = 1,485,955,049.40 × 664,119,349.20 - Step 4: Simplify right side
990,636,699.60x = 986,851,500,347,981,952 - Step 5: Solve for x
x = 986,851,500,347,981,952/990,636,699.60 - Step 6: Final answer
x = 996,179,023.80
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Half scale
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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.