Finding the Fourth Proportional to 1,121,766,417.70, 1,682,649,626.55 and 638,037,009.70
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Solution
The fourth proportional to 1,121,766,417.70, 1,682,649,626.55 and 638,037,009.70 is: 957,055,514.55
Step by Step Solution
- Step 1: Write the proportion equation
1,121,766,417.70 : 1,682,649,626.55 = 638,037,009.70 : x - Step 2: Convert to fraction form
1,121,766,417.70/1,682,649,626.55 = 638,037,009.70/x - Step 3: Cross multiply
1,121,766,417.70x = 1,682,649,626.55 × 638,037,009.70 - Step 4: Simplify right side
1,121,766,417.70x = 1,073,592,736,096,783,744 - Step 5: Solve for x
x = 1,073,592,736,096,783,744/1,121,766,417.70 - Step 6: Final answer
x = 957,055,514.55
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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.