Finding the Fourth Proportional to 1,218,038.40, 1,681,230.36 and 708,838.80
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Solution
The fourth proportional to 1,218,038.40, 1,681,230.36 and 708,838.80 is: 978,393.88
Step by Step Solution
- Step 1: Write the proportion equation
1,218,038.40 : 1,681,230.36 = 708,838.80 : x - Step 2: Convert to fraction form
1,218,038.40/1,681,230.36 = 708,838.80/x - Step 3: Cross multiply
1,218,038.40x = 1,681,230.36 × 708,838.80 - Step 4: Simplify right side
1,218,038.40x = 1,191,721,310,905.97 - Step 5: Solve for x
x = 1,191,721,310,905.97/1,218,038.40 - Step 6: Final answer
x = 978,393.88
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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.