Finding the Fourth Proportional to 1,280,128,232.80, 1,920,192,349.20 and 1,229,963,701.60
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Solution
The fourth proportional to 1,280,128,232.80, 1,920,192,349.20 and 1,229,963,701.60 is: 1,844,945,552.40
Step by Step Solution
- Step 1: Write the proportion equation
1,280,128,232.80 : 1,920,192,349.20 = 1,229,963,701.60 : x - Step 2: Convert to fraction form
1,280,128,232.80/1,920,192,349.20 = 1,229,963,701.60/x - Step 3: Cross multiply
1,280,128,232.80x = 1,920,192,349.20 × 1,229,963,701.60 - Step 4: Simplify right side
1,280,128,232.80x = 2,361,766,889,606,031,872 - Step 5: Solve for x
x = 2,361,766,889,606,031,872/1,280,128,232.80 - Step 6: Final answer
x = 1,844,945,552.40
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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.