Finding the Fourth Proportional to 1,912,972.40, 2,639,869.74 and 1,053,612.68
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Solution
The fourth proportional to 1,912,972.40, 2,639,869.74 and 1,053,612.68 is: 1,453,967.78
Step by Step Solution
- Step 1: Write the proportion equation
1,912,972.40 : 2,639,869.74 = 1,053,612.68 : x - Step 2: Convert to fraction form
1,912,972.40/2,639,869.74 = 1,053,612.68/x - Step 3: Cross multiply
1,912,972.40x = 2,639,869.74 × 1,053,612.68 - Step 4: Simplify right side
1,912,972.40x = 2,781,400,231,612.30 - Step 5: Solve for x
x = 2,781,400,231,612.30/1,912,972.40 - Step 6: Final answer
x = 1,453,967.78
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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.