Finding the Fourth Proportional to 1,389,331.80, 1,917,655.02 and 816,555.96
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Solution
The fourth proportional to 1,389,331.80, 1,917,655.02 and 816,555.96 is: 1,127,068.88
Step by Step Solution
- Step 1: Write the proportion equation
1,389,331.80 : 1,917,655.02 = 816,555.96 : x - Step 2: Convert to fraction form
1,389,331.80/1,917,655.02 = 816,555.96/x - Step 3: Cross multiply
1,389,331.80x = 1,917,655.02 × 816,555.96 - Step 4: Simplify right side
1,389,331.80x = 1,565,872,635,804.92 - Step 5: Solve for x
x = 1,565,872,635,804.92/1,389,331.80 - Step 6: Final answer
x = 1,127,068.88
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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.