Finding the Fourth Proportional to 1,988,328.31, 2,743,795.27 and 1,128,775.75
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Solution
The fourth proportional to 1,988,328.31, 2,743,795.27 and 1,128,775.75 is: 1,557,655.02
Step by Step Solution
- Step 1: Write the proportion equation
1,988,328.31 : 2,743,795.27 = 1,128,775.75 : x - Step 2: Convert to fraction form
1,988,328.31/2,743,795.27 = 1,128,775.75/x - Step 3: Cross multiply
1,988,328.31x = 2,743,795.27 × 1,128,775.75 - Step 4: Simplify right side
1,988,328.31x = 3,097,129,563,740.70 - Step 5: Solve for x
x = 3,097,129,563,740.70/1,988,328.31 - Step 6: Final answer
x = 1,557,655.02
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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.