Finding the Fourth Proportional to 1,278,649,688.24, 1,764,536,572.68 and 691,938,824.24
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Solution
The fourth proportional to 1,278,649,688.24, 1,764,536,572.68 and 691,938,824.24 is: 954,875,579.03
Step by Step Solution
- Step 1: Write the proportion equation
1,278,649,688.24 : 1,764,536,572.68 = 691,938,824.24 : x - Step 2: Convert to fraction form
1,278,649,688.24/1,764,536,572.68 = 691,938,824.24/x - Step 3: Cross multiply
1,278,649,688.24x = 1,764,536,572.68 × 691,938,824.24 - Step 4: Simplify right side
1,278,649,688.24x = 1,220,951,361,428,678,656 - Step 5: Solve for x
x = 1,220,951,361,428,678,656/1,278,649,688.24 - Step 6: Final answer
x = 954,875,579.03
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.