Finding the Fourth Proportional to 678,779.19, 936,685.01 and 406,997.06
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Solution
The fourth proportional to 678,779.19, 936,685.01 and 406,997.06 is: 561,637.79
Step by Step Solution
- Step 1: Write the proportion equation
678,779.19 : 936,685.01 = 406,997.06 : x - Step 2: Convert to fraction form
678,779.19/936,685.01 = 406,997.06/x - Step 3: Cross multiply
678,779.19x = 936,685.01 × 406,997.06 - Step 4: Simplify right side
678,779.19x = 381,228,041,550.14 - Step 5: Solve for x
x = 381,228,041,550.14/678,779.19 - Step 6: Final answer
x = 561,637.79
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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.