Finding the Fourth Proportional to 1,238,329.11, 1,708,168.86 and 778,716.48
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Solution
The fourth proportional to 1,238,329.11, 1,708,168.86 and 778,716.48 is: 1,074,172.63
Step by Step Solution
- Step 1: Write the proportion equation
1,238,329.11 : 1,708,168.86 = 778,716.48 : x - Step 2: Convert to fraction form
1,238,329.11/1,708,168.86 = 778,716.48/x - Step 3: Cross multiply
1,238,329.11x = 1,708,168.86 × 778,716.48 - Step 4: Simplify right side
1,238,329.11x = 1,330,179,241,904.81 - Step 5: Solve for x
x = 1,330,179,241,904.81/1,238,329.11 - Step 6: Final answer
x = 1,074,172.63
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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.