Finding the Fourth Proportional to 1,538,905.90, 2,122,588.68 and 1,080,122.82
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Solution
The fourth proportional to 1,538,905.90, 2,122,588.68 and 1,080,122.82 is: 1,489,796.40
Step by Step Solution
- Step 1: Write the proportion equation
1,538,905.90 : 2,122,588.68 = 1,080,122.82 : x - Step 2: Convert to fraction form
1,538,905.90/2,122,588.68 = 1,080,122.82/x - Step 3: Cross multiply
1,538,905.90x = 2,122,588.68 × 1,080,122.82 - Step 4: Simplify right side
1,538,905.90x = 2,292,656,470,741.68 - Step 5: Solve for x
x = 2,292,656,470,741.68/1,538,905.90 - Step 6: Final answer
x = 1,489,796.40
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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.