Finding the Fourth Proportional to 2,129,457.28, 2,938,612.32 and 1,211,666.40
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Solution
The fourth proportional to 2,129,457.28, 2,938,612.32 and 1,211,666.40 is: 1,672,077.60
Step by Step Solution
- Step 1: Write the proportion equation
2,129,457.28 : 2,938,612.32 = 1,211,666.40 : x - Step 2: Convert to fraction form
2,129,457.28/2,938,612.32 = 1,211,666.40/x - Step 3: Cross multiply
2,129,457.28x = 2,938,612.32 × 1,211,666.40 - Step 4: Simplify right side
2,129,457.28x = 3,560,617,810,770.05 - Step 5: Solve for x
x = 3,560,617,810,770.05/2,129,457.28 - Step 6: Final answer
x = 1,672,077.60
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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.