Finding the Fourth Proportional to 1,987,806.18, 2,739,897.18 and 1,406,278.02
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Solution
The fourth proportional to 1,987,806.18, 2,739,897.18 and 1,406,278.02 is: 1,938,346.51
Step by Step Solution
- Step 1: Write the proportion equation
1,987,806.18 : 2,739,897.18 = 1,406,278.02 : x - Step 2: Convert to fraction form
1,987,806.18/2,739,897.18 = 1,406,278.02/x - Step 3: Cross multiply
1,987,806.18x = 2,739,897.18 × 1,406,278.02 - Step 4: Simplify right side
1,987,806.18x = 3,853,057,181,293.98 - Step 5: Solve for x
x = 3,853,057,181,293.98/1,987,806.18 - Step 6: Final answer
x = 1,938,346.51
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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.