Finding the Fourth Proportional to 918,221,478.20, 1,377,332,217.30 and 504,972,956.60
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Solution
The fourth proportional to 918,221,478.20, 1,377,332,217.30 and 504,972,956.60 is: 757,459,434.90
Step by Step Solution
- Step 1: Write the proportion equation
918,221,478.20 : 1,377,332,217.30 = 504,972,956.60 : x - Step 2: Convert to fraction form
918,221,478.20/1,377,332,217.30 = 504,972,956.60/x - Step 3: Cross multiply
918,221,478.20x = 1,377,332,217.30 × 504,972,956.60 - Step 4: Simplify right side
918,221,478.20x = 695,515,521,990,414,720 - Step 5: Solve for x
x = 695,515,521,990,414,720/918,221,478.20 - Step 6: Final answer
x = 757,459,434.90
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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.