Finding the Fourth Proportional to 919,690,838.80, 1,268,983,896.68 and 528,474,680.08
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Solution
The fourth proportional to 919,690,838.80, 1,268,983,896.68 and 528,474,680.08 is: 729,186,190.11
Step by Step Solution
- Step 1: Write the proportion equation
919,690,838.80 : 1,268,983,896.68 = 528,474,680.08 : x - Step 2: Convert to fraction form
919,690,838.80/1,268,983,896.68 = 528,474,680.08/x - Step 3: Cross multiply
919,690,838.80x = 1,268,983,896.68 × 528,474,680.08 - Step 4: Simplify right side
919,690,838.80x = 670,625,858,824,634,752 - Step 5: Solve for x
x = 670,625,858,824,634,752/919,690,838.80 - Step 6: Final answer
x = 729,186,190.11
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.