Finding the Fourth Proportional to 1,221,749.97, 1,686,071.75 and 763,136.07
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Solution
The fourth proportional to 1,221,749.97, 1,686,071.75 and 763,136.07 is: 1,053,163.25
Step by Step Solution
- Step 1: Write the proportion equation
1,221,749.97 : 1,686,071.75 = 763,136.07 : x - Step 2: Convert to fraction form
1,221,749.97/1,686,071.75 = 763,136.07/x - Step 3: Cross multiply
1,221,749.97x = 1,686,071.75 × 763,136.07 - Step 4: Simplify right side
1,221,749.97x = 1,286,702,163,187.21 - Step 5: Solve for x
x = 1,286,702,163,187.21/1,221,749.97 - Step 6: Final answer
x = 1,053,163.25
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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.