Finding the Fourth Proportional to 1,280,128,231.80, 1,920,192,347.70 and 1,259,720,897.40
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Solution
The fourth proportional to 1,280,128,231.80, 1,920,192,347.70 and 1,259,720,897.40 is: 1,889,581,346.10
Step by Step Solution
- Step 1: Write the proportion equation
1,280,128,231.80 : 1,920,192,347.70 = 1,259,720,897.40 : x - Step 2: Convert to fraction form
1,280,128,231.80/1,920,192,347.70 = 1,259,720,897.40/x - Step 3: Cross multiply
1,280,128,231.80x = 1,920,192,347.70 × 1,259,720,897.40 - Step 4: Simplify right side
1,280,128,231.80x = 2,418,906,427,425,256,960 - Step 5: Solve for x
x = 2,418,906,427,425,256,960/1,280,128,231.80 - Step 6: Final answer
x = 1,889,581,346.10
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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.