Finding the Fourth Proportional to 918,221,471.70, 1,377,332,207.55 and 504,972,950.10
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Solution
The fourth proportional to 918,221,471.70, 1,377,332,207.55 and 504,972,950.10 is: 757,459,425.15
Step by Step Solution
- Step 1: Write the proportion equation
918,221,471.70 : 1,377,332,207.55 = 504,972,950.10 : x - Step 2: Convert to fraction form
918,221,471.70/1,377,332,207.55 = 504,972,950.10/x - Step 3: Cross multiply
918,221,471.70x = 1,377,332,207.55 × 504,972,950.10 - Step 4: Simplify right side
918,221,471.70x = 695,515,508,114,269,056 - Step 5: Solve for x
x = 695,515,508,114,269,056/918,221,471.70 - Step 6: Final answer
x = 757,459,425.15
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Half scale
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Double scale
Find fourth proportional to 918,221,472.70, 1,377,332,209.05 and 504,972,951.10
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.