Finding the Fourth Proportional to 1,292,670,018.70, 1,939,005,028.05 and 898,128,220.30
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Solution
The fourth proportional to 1,292,670,018.70, 1,939,005,028.05 and 898,128,220.30 is: 1,347,192,330.45
Step by Step Solution
- Step 1: Write the proportion equation
1,292,670,018.70 : 1,939,005,028.05 = 898,128,220.30 : x - Step 2: Convert to fraction form
1,292,670,018.70/1,939,005,028.05 = 898,128,220.30/x - Step 3: Cross multiply
1,292,670,018.70x = 1,939,005,028.05 × 898,128,220.30 - Step 4: Simplify right side
1,292,670,018.70x = 1,741,475,134,995,298,048 - Step 5: Solve for x
x = 1,741,475,134,995,298,048/1,292,670,018.70 - Step 6: Final answer
x = 1,347,192,330.45
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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.