Finding the Fourth Proportional to 1,988,427.96, 2,744,032.36 and 1,128,988.21
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Solution
The fourth proportional to 1,988,427.96, 2,744,032.36 and 1,128,988.21 is: 1,558,004.74
Step by Step Solution
- Step 1: Write the proportion equation
1,988,427.96 : 2,744,032.36 = 1,128,988.21 : x - Step 2: Convert to fraction form
1,988,427.96/2,744,032.36 = 1,128,988.21/x - Step 3: Cross multiply
1,988,427.96x = 2,744,032.36 × 1,128,988.21 - Step 4: Simplify right side
1,988,427.96x = 3,097,980,182,298.48 - Step 5: Solve for x
x = 3,097,980,182,298.48/1,988,427.96 - Step 6: Final answer
x = 1,558,004.74
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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.