Finding the Fourth Proportional to 1,421,057.70, 2,129,772.15 and 578,657.70
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Solution
The fourth proportional to 1,421,057.70, 2,129,772.15 and 578,657.70 is: 867,247.72
Step by Step Solution
- Step 1: Write the proportion equation
1,421,057.70 : 2,129,772.15 = 578,657.70 : x - Step 2: Convert to fraction form
1,421,057.70/2,129,772.15 = 578,657.70/x - Step 3: Cross multiply
1,421,057.70x = 2,129,772.15 × 578,657.70 - Step 4: Simplify right side
1,421,057.70x = 1,232,409,053,843.06 - Step 5: Solve for x
x = 1,232,409,053,843.06/1,421,057.70 - Step 6: Final answer
x = 867,247.72
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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.