Finding the Fourth Proportional to 919,303,487.20, 1,378,955,230.80 and 305,949,714.40
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Solution
The fourth proportional to 919,303,487.20, 1,378,955,230.80 and 305,949,714.40 is: 458,924,571.60
Step by Step Solution
- Step 1: Write the proportion equation
919,303,487.20 : 1,378,955,230.80 = 305,949,714.40 : x - Step 2: Convert to fraction form
919,303,487.20/1,378,955,230.80 = 305,949,714.40/x - Step 3: Cross multiply
919,303,487.20x = 1,378,955,230.80 × 305,949,714.40 - Step 4: Simplify right side
919,303,487.20x = 421,890,959,033,646,016 - Step 5: Solve for x
x = 421,890,959,033,646,016/919,303,487.20 - Step 6: Final answer
x = 458,924,571.60
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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.